Six years of data against a 2020 thesis — including where the original was wrong.
This addendum puts every load-bearing claim in the 2020 paper against September 2026 data and reports the result. Five of six conclusions hold. The framework held; almost every price attached to it has moved.
The short version: the framework held, and so did the two claims it is most often argued with. A 10x revenue multiple and a 45–50% cash-flow margin are both defensible in 2026 — on conditions the original left unstated and this addendum states. Two inputs moved far enough to change what a rational investor should pay: the discount rate, and the exit multiple.
In August 2020 we published Investing in Software? You bet your assets. It argued that software is a distinct asset class, that revenue multiples are a rational lens on it, that a well-run software company can levelize at 45–50% cash-flow margins, that a 10x revenue multiple is defensible from first principles, and that software returns outrun most other asset classes. Six years is long enough for the market to have an opinion.
This addendum puts every load-bearing claim in that paper against the data and reports the result — including where the original was wrong, and where the arithmetic did not follow from its own inputs. We are publishing the corrections rather than quietly reprinting. An investor who acted on the 2020 paper deserves to know which parts survived contact with 2022, 2023 and 2026.
The 2020 paper listed six conclusions on its first page. It is fair to grade those before explaining any of them. Five hold. One does not, and it is the one we stated most confidently.
| Conclusion, as published in August 2020 | Verdict | Where it stands in September 2026 |
|---|---|---|
| The innovation revolution will reshape finance, education, social construction and government as the industrial revolution did | Confirmed | Software investment reached $817bn a year, 2.45% of US GDP, up from 2.24% in 2020. Gartner software spend grew every year of the downturn. |
| Software is a key component of that revolution | Confirmed | Uncontested. Software spend grew 15.5% in 2026 to $1.47tn while IT services grew 5.3%. |
| Valuing software is a new discipline; industrial-economy structures are inadequate to it | Confirmed | More true now. Revenue multiples alone no longer discriminate; gross margin and retention have to be priced separately. |
| Valuations above 10x revenue for cash-flow-negative firms are not necessarily unreasonable | Confirmed | Supported, then and now. On the paper's own two-stage method, 10x requires roughly 10% sustained growth at the 2020 discount rate and 21% at today's — both inside the range we underwrite. Where the public market happens to clear is a price, not a test of the model. |
| Software returns should approximate revenue growth rates in the long term | Confirmed | Holds as an identity given entry and exit discipline: buy and sell at the same multiple and the return is the revenue CAGR. Fund I at 2.0x and Fund II at 2.01x TVPI through the worst software repricing in two decades is the evidence. |
| SaaS returns are outpacing most other asset classes | Contradicted | As an index claim it failed: since January 2020, on a price-return basis, Nasdaq 100 +238%, S&P 500 +139%, BVP Emerging Cloud +64%. But the index bought at 17.7x in December 2020. This is an entry-price failure, not a property of the asset. |
Verdicts are against the sources listed in the appendix. Confirmation of a conclusion is not confirmation of the figures underneath it — Sections II to IV set out where those have moved.
"The framework held and the numbers did not. The discipline of how to look at a software company survived; almost every price we attached to it has moved."
The 2020 paper built a discount rate from scratch and arrived at 6.87%. It is worth restating the build, because the method is still right and only the inputs are wrong. We took a 1% nominal risk-free rate (0% real, with a 1% inflation premium), added a 2% duration premium for a roughly six-year hold, added 2.5% for default risk using the spread between the 10-year Treasury and Moody's Baa corporate yield, and grossed the 5.5% subtotal up by 1.25 for a 20% private-company discount.
Every judgment in that build was defensible in 2020. The 0% real risk-free rate was, if anything, conservative: the 10-year TIPS yield actually closed 2020 at −0.98%. We leaned on Paul Schmelzing's Bank of England work arguing that real rates were in an eight-century secular decline and that negative real rates could persist for a long time.
That call is now decisively wrong, and the authority we cited has revised it himself. Rogoff, Rossi and Schmelzing published in the American Economic Review in August 2024 finding that real rates are trend stationary, not a random walk; that the long-run downward trend is roughly 1.6 basis points a year — about ten basis points over a six-year hold, which is to say nothing; and that mean reversion runs on half-lives of one to six years. On their revised reading, the post-crisis collapse in real rates was a cyclical deviation, not a secular shift. The 10-year real yield has now been positive every month since May 2022 and above 1.6% for thirty-nine consecutive months.
Substituting today's observable inputs into the paper's own method: the three-month bill is 3.89%, the Baa–Treasury spread is 1.57%, and we keep the paper's 2.00% duration judgment even though the curve now pays about 0.70% at the six-year point. Credit is the one component that argues for a lower rate than we used — the spread has averaged under 2.0% every year since 2022, well below the 2–3.5% band we described. It is not nearly enough to offset the risk-free move.
The discount rate for private B2B software rises from 6.87% to 9.33% — up 246 basis points, or 36%. A defensible range is 7.7% to 9.3% depending on how much duration premium you are willing to assert over the curve.
A revenue multiple is not a claim about cash flow today. It is a claim about the size and durability of cash flow later, and the arithmetic only works if growth is carried explicitly. The 2020 paper did carry it — it valued software with the present value of a growing annuity rather than capitalizing a flat cash flow — and that method is right. Capitalize 45% at 6.87% with no growth and you get 6.6x, which is why the critics of software multiples always arrive at a low number: they are pricing a business that has stopped compounding.
What the paper did not do was state the growth rate its 10x conclusion required, and that omission is worth repairing, because the growth rate is the whole argument. Run the method with its own inputs — revenue compounding at g for five years, then a 45% cash-flow margin capitalized at the discount rate less 2% terminal growth, discounted back — and the threshold falls out directly.
The rate shock did not invalidate 10x. It raised the price of admission. For a fund underwriting $1–8M ARR companies scaling to $15M — which is to say growth in the twenties and thirties — every one of those thresholds is inside the range. That is the useful form of the claim, and it is more demanding than the original. It says 10x is cheap for a company compounding at 30% and indefensible for one compounding at 10%. The 2021 vintage did not fail because 10x was wrong; it failed because people paid 10x and more for companies growing 15%, and then the growth slowed.
The single most consequential number in the 2020 paper was this: once a software company shifts from growth generation to cash-flow generation, the sustainable net cash-flow potential should be 45 to 50% of revenue. Everything downstream depended on it — the valuation formula, the sales-efficiency ceiling, the comparison to a stabilized office building.
It is the claim we are challenged on most, and it is almost always tested the wrong way. Point at Microsoft's 20% free cash flow margin, or Salesforce's 34%, and the rule looks fanciful. But Microsoft is building data centers and Salesforce is spending roughly a third of revenue on sales and marketing. Both are making investment decisions; neither is reporting a cost of operation. Measuring companies that are still buying growth against a no-growth steady state answers a different question than the one asked.
The right test is software that has actually stopped growing.
| Company | Revenue growth | FCF margin, latest FY |
|---|---|---|
| Qualys | +10.1% | 45.5% |
| Check Point | +6.3% | 43.0% |
| Adobe | +10.5% | 41.5% |
| Zoom | +4.4% | 39.5% |
| Dropbox | –1.1% | 36.9% |
| NetScout | +4.5% | 33.2% |
| DocuSign | +8.2% | 32.9% |
| Dolby | +5.9% | 32.3% |
| Box | +8.0% | 29.8% |
| F5 | +9.7% | 29.4% |
| Blackbaud | –2.3% | 22.9% |
| 8x8 | +2.9% | 7.1% |
Free cash flow margin against revenue growth, latest reported fiscal year, from company filings via stockanalysis.com. Excludes licensing and registry businesses (VeriSign 64.5%, InterDigital 63.4%) as unrepresentative of operating software. Figures are before stock-based compensation.
Qualys delivers 45.5% while growing 10%. Check Point delivers 43.0% growing 6%. Dropbox — the cleanest case in the set, because it has already cut sales and marketing to a maintenance level — delivers 36.9% at minus one percent growth. The rule is real. What is not true is the strong form of the objection, that essentially no software company reaches the band; it fails the moment you look at companies that have stopped buying growth.
The structural argument holds up better than the original stated it. SaaS Capital's 2026 spending survey of more than a thousand private B2B SaaS companies puts customer support and success at 9% of revenue, G&A at 15%, and total R&D at 22%. Take support, G&A and half of R&D as the genuinely non-discretionary maintenance load and the floor is 35% of revenue below gross profit — the 2020 paper's number, arrived at independently. At public-company scale, where G&A runs 6–9% rather than 15%, the floor is nearer 28%.
And the evidence that the rest is discretionary is stronger than we had in 2020. Three findings:
"A company reporting 10% margins at 10% growth is not investing in growth. It is either spending the discretionary 40% badly, or it is not the business it claims to be."
The rule holds. Its domain is narrower than the original implied, and three conditions decide whether a given company sits inside it.
Read those together and the argument between "45–50% is a rule" and "the median delivers 30%" resolves completely. Both are right, about different companies. At 96% gross retention the cost of standing still is five to eight points of revenue and the steady state lands at 47–50%. At the current private median of 84% it is twenty-one to thirty-two points and the steady state lands at 23–34%. The cost structure was never the binding constraint. Retention is.
That is a more useful statement than the original, because it makes the 45–50% claim testable in diligence rather than aspirational. It also unifies two sections of the 2020 paper that were written as separate arguments: cash-flow stability and cash-flow magnitude are the same variable. Churn is not merely how stability gets expressed, as we wrote in 2020 — it sets the achievable margin directly, at roughly 1.3 to 2.0 points of steady-state margin per point of retention.
The 45–50% rule stands, with its conditions stated: a software company with gross margin at or above 80% and gross revenue retention at or above 95% has a structural cost floor near 30–35% of revenue and can sustain 45–50% cash flow margins pre-stock-compensation, 35–45% after.
Every point of gross retention below 95% costs 1.3–2.0 points of steady-state margin; every point of gross margin below 80% costs one point directly. Underwrite the ceiling only where both conditions are met — and underwrite 25–35% where they are not.
Bain studied 33 software buyouts and found that sponsors — the most motivated margin-maximizers in the market, operating with full control and a standardized playbook — underwrote a median margin improvement of only 560 basis points over a five-year hold, and that realized margin growth badly trailed even that. Returns came from revenue growth and multiple expansion, not from the operating leverage the playbook promises.
Anyone arguing that 45–50% is routinely reachable has to answer that finding. Our answer is that the sponsors in Bain's sample were mostly buying companies that failed condition two — you cannot cut your way to 45% out of an 85%-retention business — but that is a hypothesis, and we hold it loosely.
The 2020 paper made two claims about market pricing. The first was that exit multiples are driven by revenue growth, with a relationship "linear, bordering on exponential." The second was that the SEG SaaS index had outperformed the Nasdaq 100, which in turn outperformed the S&P 500. The first has held and sharpened. The second has inverted.
| Median EV / NTM revenue | Dec 2020 | Dec 2021 | Dec 2022 | Dec 2023 | Dec 2024 | Dec 2025 | Sep 2026 |
|---|---|---|---|---|---|---|---|
| Public software basket | 17.7× | 12.4× | 5.2× | 6.5× | 6.1× | 4.7× | 4.4× |
Median EV/NTM revenue for the Clouded Judgement public software basket (~100 companies, consistent methodology throughout). The June 2026 trough of 3.1–3.2x was below the December 2022 low, and in the first quarter of 2026 software traded at or below the S&P 500 forward multiple for the first time in the cloud era.
Two full cycles in six years. The first drawdown, 2021–22, was the ZIRP unwind: median multiples fell from 17.7x to 5.2x, roughly $1.4 trillion of cloud market capitalization evaporated, and the punishment was quality-sorted — companies below Rule of 40 compressed 78% against 58% for those above it. The second, in the first half of 2026, had no recession behind it at all. It was an AI-disruption repricing: the software category fell 34% over twelve months, the steepest non-recessionary decline in more than thirty years, with the sharpest single-day damage following a model launch rather than an earnings miss.
| Growth cohort | Dec 2020 | Sep 2026 | Change |
|---|---|---|---|
| Low growth | 7.9× | 3.9× | –51% |
| Mid growth | 19.1× | 6.7× | –65% |
| High growth | 33.7× | 18.1× | –46% |
Median EV/NTM revenue by growth cohort, Clouded Judgement. Cohort cut-offs moved with the market — "high growth" meant above 30% in 2020 and above 22% in 2026 — so this is a directional comparison, not a like-for-like one.
The convexity we described is intact and steeper. The ratio between the top and bottom cohorts widened from roughly 3.8x in the SEG 2020 data to 4.6x today, and on SEG's own trailing series the spread is 5.3x: 2.4x for companies growing under 10%, 12.7x for those growing 20–30%. What has changed is that every level fell, and slow growth is now barely priced at all. A software company growing under 15% is worth 3.9x revenue, half what the same company was worth in 2020.
It is worth being precise about what the market is actually saying, because it is not that the model is wrong. Solve the two-stage model backwards: at the public median growth rate of about 12%, today's 4.4x implies a stabilized cash-flow margin of roughly 29%. That is not a rejection of the 45–50% rule — it is a price consistent with a business retaining 88–90% of its revenue rather than 95%, which is exactly where the public median now sits. The market is pricing the retention deterioration, and pricing a little more risk on top for AI. Public multiples are a statement about the median company's durability, not a test of what a durable company is worth.
One caveat against our own thesis: the statistical relationship between growth and multiple is weakening even as the cohort medians move apart. First Analysis measures the correlation for 2026 estimated revenue at R = 0.35 in the second quarter, down from 0.48 in the first. Dispersion within cohorts has exploded. The right description of today's market is not a curve but a bimodal distribution: five companies above 10x forward revenue, 80% of the universe below 5x, and very little in between. The market is not paying for growth so much as it is paying for a small set of names it believes are on the right side of AI.
| Cumulative price return, Jan 2020 – Sep 2026 | Return |
|---|---|
| Nasdaq 100 | +238% |
| S&P 500 | +139% |
| BVP Emerging Cloud (software) | +64% |
One basis for all three, since a total-return series is not published for the cloud index (FRED NASDAQEMCLOUD; QQQ and SPY price levels). On a total-return basis the ordering is unchanged. The 2020 paper asserted the ordering SaaS > Nasdaq 100 > S&P 500.
This is the plainest failure in the paper. We wrote in the autumn of 2020, at the top of a software melt-up, and extrapolated a two-year index history into an asset-class property. Cloud software lost to the Nasdaq 100 in 2021, 2022 and 2025, and its five-year annualized return through June 2026 was −49.7%. The SEG SaaS index fell 22.2% in 2025 against an S&P up 17.9%.
The distinction that matters — and the paper should have drawn it at the time — is between the asset and the entry price. The 2020 paper's other conclusion, that software returns should approximate revenue growth, is close to an identity: buy and sell at the same multiple and the return is the revenue CAGR, less dilution. Everything that went wrong for the index went wrong at the entry point.
| Entry multiple paid | Gross MOIC over five years |
|---|---|
| 4.5× (today's market) | 3.05× |
| 6.0× | 2.29× |
| 10.0× (the 2020 debate) | 1.37× |
| 17.7× (Dec 2020 public) | 0.78× |
A company compounding revenue at 25% for five years (3.05x cumulative), sold at 4.5x revenue. The only variable is what the investor paid going in. Gross multiple on invested capital, before ownership, fees and dilution.
This is why an index that bought at 17.7x in December 2020 lost to the S&P while the underlying companies kept compounding, and it is why our own funds did not. Fund I is marked at 2.0x and Fund II at 2.01x TVPI through the steepest software repricing in two decades. Neither number is an argument that software outperformed as an asset class over the period. Both are arguments that entry discipline is the variable, and that the 2020 paper was right about the mechanism and wrong to attach it to an index that had no discipline at all.
The intellectual core of the 2020 paper was not the multiple. It was the claim that software cash flows are stable, and that the stability comes from a specific mechanism: the customer's problem, the value proposition, the accumulating data asset, switching costs and contract strength. We wrote the stability as a function of those five variables and said churn is how it gets expressed. That was the argument for treating software like a bond, and it is the argument the last two years have damaged most.
| Private B2B SaaS retention | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Net dollar retention | 105% | 103% | 102% | 101% | 101% |
| Gross revenue retention | — | 90% | 89% | 88% | 84% |
Benchmarkit annual B2B SaaS benchmarks (n ≈ 340–580). The 2025 fall in gross retention appeared at every quartile — median 88% to 84%, upper quartile 95% to 91%, lower quartile 78% to 74% — which makes it a distributional shift rather than a tail event.
Two things are wrong here relative to what we wrote. The first is that we treated 105% net dollar retention — −5% net churn — as an unremarkable good case. It was never the private median. SaaS Capital measured 100% in 2019, the paper's own vintage; 105% was the 2021 peak, and it has fallen every year since to 101%. We anchored on the best number available at the top of a cycle.
The second is more serious. Net retention is a blended figure, and the blend has been flattering. Gross retention — which is the direct measurement of the stability we theorized — fell from 88% to 84% in a single year, at every quartile. A company losing sixteen cents of every revenue dollar each year and replacing it through expansion is not the annuity we described. Expansion now supplies 40% of net new ARR at the median and 67% above $100M ARR, which means the reported top line increasingly rests on selling more to a shrinking installed base.
In 2020 essentially all B2B software was priced per seat and the question did not arise. Usage-priced companies now retain at 108% net; seat-priced companies retain at 98%. That is a ten-point structural gap in a variable we never modeled.
This belongs in our cash-flow-stability function as a sixth term. The mechanism is straightforward: a seat-priced contract is a claim on the customer's headcount, and headcount is now the thing customers are most actively trying to reduce. A usage-priced or outcome-priced contract is a claim on the customer's work volume, which is not falling. ServiceNow reported that 50% of net new business in its second quarter of fiscal 2026 was non-seat-based, and its renewal rate is 98% — the 2020 paper's stability thesis, intact, in the most AI-exposed workflow category there is, at a company that repriced away from seats.
Cash-flow stability is a function of six variables, not five. Add pricing architecture to customer problem, value-proposition value, data asset, switching costs and contract strength. In diligence, a seat-priced contract in a headcount-exposed function should now carry an explicit discount to assumed gross retention.
The 2020 paper contained a genuinely provocative claim, and we made it on purpose: that with a median cost of $1.34 to acquire $1 of new ARR, and a rational willingness to pay up to $4.50 (or $6–7 with a near exit), software companies as an industry were not spending enough on sales. Not burning enough cash. It is the argument we were most often challenged on, and it has not survived.
Three corrections. First, on the baseline: we could not re-source the $1.34 figure to a primary KeyBanc document. The defensible baseline for that vintage is KeyBanc's CY2020 blended figure of $1.20, and that is the number to compare against. Second, on the level: the correct comparator for "cost to acquire $1 of new ARR" is the new-logo ratio, and that now sits at $2.00 at the median and $2.82 at the fourth quartile. Acquisition is roughly 50% more expensive than the number we built the argument on, and it rose 14% in a single year while blended CAC was falling. Blended CAC fell over the same period only because expansion ARR — which costs about $1.00 per dollar — rose from 25% to 40% of net new ARR. That is a mix shift, not an efficiency gain.
Third, on the willingness-to-pay ceiling. The $4.50 figure was derived from the 45–50% cash-flow margin and a 9x exit. Both of those inputs are now materially lower. Rebuilt on a 22% cash-flow margin and a 4.5x exit, the rational ceiling is closer to $2.20–$3.00 per dollar of new ARR — which happens to be roughly where the fourth quartile is already spending. The industry is no longer under-spending on sales. At the margin it is spending about the right amount, and the top quartile may be over-spending.
There is a related finding that changes how we would run the diligence. The variance in growth outcomes is no longer well explained by sales spend at all. High Alpha's 2025 cohort analysis splits companies by retention and payback rather than spend: companies with net retention above 106% and CAC payback under ten months grew 71% at the median with a Rule of 40 score of 47; companies below 98% retention with payback over fifteen months grew 10% with a score of 5. A seven-fold growth spread, and sales-and-marketing intensity is nearly flat across every revenue band at 25–30% of revenue. The throttle we described is real, but it is downstream of retention, not independent of it.
The 2020 paper made five falsifiable claims about how software behaves in a downturn, drawn from 2008–09 and from our own earlier piece, The Golden Age of B2B SaaS? The 2022–23 software recession was a clean test. We got two right, one half right, and two wrong.
| Claim, 2020 | Verdict | What happened |
|---|---|---|
| Customer acquisition costs fall about 40% in a downturn; a sales dollar goes 1.66x farther | Contradicted | Public CAC payback rose from 25 to 38 months between January and December 2022. Private new-logo CAC rose from $1.76 to $2.00. A sales dollar went roughly 0.6x as far. |
| Growth moderates sharply but stays above zero | Confirmed | Median growth never went negative. The proportional deceleration (−45% to −57%) was milder than our own 2008–09 figure of −80%. But it ran four years without a rebound, where 2008–09 was a two-year V. |
| Profitability surges from peak to trough | Confirmed | Median public operating margin swung from −21% in mid-2022 to +3% in February 2026 — 24 points, more than double the 10-point swing we cited from 2008–09. |
| Payroll gets cheaper and experienced talent easier to attract | Partly confirmed | 703,000 tech layoffs 2022–25 and job postings down 72% from peak, so availability improved enormously. But cash compensation did not fall — senior and staff engineers got more expensive (+4.2% and +7.5% in 2025). The discount was entirely in junior talent. |
| Software is relatively protected from bubble dynamics | Contradicted | Software was the bubble. $1.4tn of cloud market cap lost 2021–23, multiples down 62% peak to trough, and a second 34% drawdown in 2026 with no recession at all. |
The profitability call is the one we should be most pleased with, and it is worth being precise about why we were right for slightly the wrong reason. We argued margins would expand because buyer behavior improves in a downturn. In fact margins expanded because vendors cut — R&D fell eight points as a share of revenue, 703,000 people lost jobs, and prices went up. It was supply-side austerity, not demand-side rescue. Margins also got worse before they got better, bottoming twelve to eighteen months after the shock rather than during it.
The CAC call failed because we modeled the wrong buyer psychology. We predicted that managers pushed into loss territory would become more willing to buy change. What actually happened was procurement scrutiny: average contract values in Vendr's transaction data fell 51% from the second quarter of 2022 to the second quarter of 2023, renewal ACV fell 11% across 2023, one-year contracts rose from 79% to 85% of the market, and vendors held price and lost volume rather than discounting. Buyers behaved procyclically and defensively.
| Worldwide IT spending growth | 2022 | 2023 |
|---|---|---|
| Software | +10.7% | +12.4% |
| IT services | +3.5% | +5.5% |
| Total IT | +0.8% | +3.3% |
| Devices | –8.4% | –8.6% |
Gartner worldwide IT spending growth by segment. Gartner restates prior years at every release, so no single press release contains this set. Later vintages put 2022 devices between −6.3% and −10.6%; the direction is stable, the decimal is not. Software grew 15.5% in 2026 to $1.47tn.
This is the chart that rescues the section. In the two worst years for software as an investment, software was the fastest-growing category of enterprise spending on earth. Total IT spend was roughly flat in 2022; devices fell 8.4% and again 8.6%; data center systems fell. Software grew 10.7% and then 12.4%. Gartner's own language at the time was that "enterprise IT spending is recession-proof," with 69% of finance leaders planning to increase digital spend into the teeth of the downturn.
So the correct formulation is narrower than the one we published. Software demand is countercyclical at the aggregate spend level, because enterprises substitute software for labor and hardware when they need efficiency. Software economics are not countercyclical at the unit level: it gets harder and more expensive to win a new logo precisely when budgets tighten. Both statements are true, and the 2020 paper conflated them.
Replace "software is countercyclical" with a quality-sorted version. In 2022 the drawdown was 58% for companies above Rule of 40 and 78% for those below. Mission-critical categories — DevOps, ERP, supply chain, security — expanded multiples between the third quarters of 2022 and 2023. The countercyclical property belongs to mission-critical, efficiency-delivering, non-seat-priced software. It does not belong to software as a class.
AI is not the only thing that changed since 2020, and this addendum deliberately does not treat it as the whole story — the rate move did more damage to the valuation math than AI has. But AI is the only development that attacks the paper's assumptions rather than its inputs, so it deserves its own section. We will take the bear case and the bull case at full strength, because both are strong.
| AI product gross margin | 2024 | 2025 | 2026 | 2027E |
|---|---|---|---|---|
| Median AI product gross margin | 41% | 45% | 52% | 59% |
| Traditional SaaS, for comparison | ≈78% | ≈78% | ≈78% | ≈78% |
ICONIQ State of AI, roughly 300 AI product leaders per wave. AI products were 32% of software revenue in 2025 and 42% in 2026, projected at 53% for 2027. Inference alone is about 23% of total spend at the scaling stage, up from 20% pre-launch — a cost line the 2020 paper's 10–15% cost-of-sales assumption has no room for.
The gross margin problem is the concrete one. We wrote that software runs at 70–90% gross margin with cost of sales at 10–15% of revenue, mostly hosting. Traditional SaaS still delivers on that — the median is 76–80%. But AI-delivered revenue does not, and AI-delivered revenue is now 42% of the total. Blend a 42% share at roughly 53% margin with a 58% share at 78% and you get about 68% — already below our floor. The trajectory is genuinely improving as per-token inference costs collapse by an order of magnitude a year, but it lands roughly twenty points below what we assumed, and cost of goods is now variable with usage in a way it never was for seat-based software. Compression is worst in exactly the band we invest in: High Alpha measured gross margin down seven points year over year below $1M ARR and four points at $1–5M, against flat above $5M.
The second problem is subtler and, we think, the more important one. The 2020 paper said selling software is selling change, and people want change like they want a hole in the head. We presented that friction as the reason acquisition is hard. What we did not notice is that the friction and the moat were the same thing. AI has reduced change-resistance measurably — sales cycles fell from 25 weeks in 2025 to 19 in 2026, and 20% of new startups charge a first customer within thirty days against 8% in 2020 — and that reduction runs in both directions. It is easier to sell into an account and easier to be displaced from one. Gross retention falling four points at every quartile is the same phenomenon viewed from the other side.
On durability, the AI-native cohort is a warning rather than a template. ChartMogul's 2025 panel of 200 AI-native companies shows median gross retention of 40% and net retention of 48%, against 82% net for B2B SaaS in the same panel. Speed is real — median time to $1M ARR is 11.5 months against roughly 15.5 for the fastest traditional SaaS, and Bessemer's fastest cohort reaches $100M in eighteen months against seven years — but a dollar of that revenue is worth considerably less than a dollar of ours. In discounted cash flow terms the two effects substantially offset, which is a point neither the bulls nor the bears usually make.
The bull case is not sentiment; it has numbers behind it, and they are large.
The build barrier has genuinely fallen and the maintain-secure-integrate-and-be-trusted barrier has not. Google reports 75% of its new code is AI-generated and 90% of developers use AI tools; against that, METR's randomized trial found experienced developers were 19% slower with AI available while believing they were 20% faster, and GitClear's analysis of 623 million code changes finds refactoring down 70%, duplicated blocks up 81% and two-week churn up 15%. Google's own DORA research finds AI positively related to throughput and negatively related to delivery stability.
For a vertical B2B software investor that resolves cleanly. Getting to a demoable v1 is dramatically cheaper, so the number of competitors at the bottom of the market goes up. Getting to a system a regulated mid-market business will run its operations on is not cheaper, and may be getting harder. The moat was never the code.
One finding does cut against us specifically, and it should be said plainly. ICONIQ reports that 43% of AI products being built are vertical applications and roughly 70% of AI builders are focused on vertical AI. The AI-native attack is aimed directly at vertical software, because vertical workflows are where domain-specific agents have the clearest return. What protects a vertical company is proprietary workflow data and regulatory embedding — not the vertical label. And on multiples the market currently agrees: SEG's public data puts vertically focused software at 3.7x, near the bottom of its category table, while AI-native applications trade at 4.1x against 2.2x for horizontal.
The 2020 paper's most optimistic section argued that the banking system was rearchitecting itself around software, that venture debt had grown from under $5bn in 2006 to more than $25bn in 2019, that losses were under 2%, and that revenue-based lending had been competed down from 25–35% APRs to as low as 6–7%. We named Pipe as the emerging market for ARR as a tradeable asset. The direction of that call was right and larger than we imagined. The pricing was wrong by several hundred basis points, and one of our two named examples no longer exists.
| Claim, 2020 | Verdict | Position, September 2026 |
|---|---|---|
| Venture debt above $25bn in 2019 | Confirmed | Directionally right and then some: US venture debt reached a record $68.8bn in 2025. But that came from 1,119 loans against 1,643 in 2021, and H1 2026 was $64.7bn from just 280 loans — one of them a $20bn SpaceX refinancing. We could not re-source a 2019 figure to a primary release and do not restate one. |
| Losses under 2%, comparable to commercial lending at 1–2% | Split | Realized losses hold: Hercules reports 2 basis points annualized since inception. Non-accruals do not: the public BDC average is 4.2% and venture-lending BDCs range 0.3% to 7.3%, rising through 2026. And commercial bank business-loan charge-offs are 0.58%, not 1–2%. |
| Revenue-based facilities available at 6–7% APR | Contradicted | Nothing prices there. The floor is about 9% for the largest sponsor-backed borrowers; typical software company pricing is 10–15%. Sponsor-backed ARR loans clear at SOFR + 650bp, roughly 10.2% all-in. |
| ~40% of run-rate ARR as a five-year note | Superseded | Advance rates rose to 50–70% of ARR at the small end and 1.75–2.65x ARR in the sponsor market; terms shortened to 12–48 months. PIK toggles, which we mentioned in passing, are now mainstream. |
| Pipe as the emerging ARR marketplace | Superseded | The marketplace was wound down in early 2024. Pipe's 2024 revenue was $7.1m against ~$47m of burn; roughly half the workforce went in November 2025. |
Two structural developments we did not anticipate matter more than any of the above. The first is the failure of Silicon Valley Bank in March 2023. SVB held 60–70% of the venture debt market. Nobody replaced it at scale — Hercules, Trinity and Horizon between them added a few hundred million against a $6.7bn book — and the durable result was a repricing of 300–400 basis points, terms shortened from three or four years to two or three, and the long tail of small borrowers simply losing access. Dollar volume is at a record; availability for a $5M ARR company is worse than it was in 2020.
The second is the arrival of private credit at a scale that dwarfs venture debt. Loans outstanding to software companies went from roughly $8bn in 2015 to more than $500bn at the end of 2025 — 19% of all US direct lending. One third of private credit funds have made a SaaS loan; BDCs put over 15% of 2025 lending into the sector. The capital-stack rearchitecture we predicted happened, at sixty times the scale, and it happened in private credit rather than in banks.
That is worth watching rather than celebrating. Roughly $130bn of the $657bn broadly-syndicated software acquisition loan universe now trades below ninety cents on the dollar. A sector that took on a great deal of ARR-backed leverage at 2021 valuations is being repriced for AI risk, and the loans were underwritten against multiples that no longer clear.
The 2020 paper's worked example is the piece most often quoted back to us, so it deserves the most direct correction. We described a founder who raised $2.25m in total, reached $19.2m of run-rate revenue, and sold at 9x revenue for $175m — a 77x return on invested capital. Every step of that is arithmetically fine. The 9x is not available.
| Transaction size | Median EV / revenue |
|---|---|
| <$5M | 2.5× |
| $5–20M | 2.1× |
| $20–50M | 2.7× |
| $50–100M | 3.7× |
| $100–500M | 5.3× |
| $500M+ | 6.7× |
Median EV/Revenue by transaction size across 1,325 disclosed software transactions, 2015–2025 (Aventis Advisors). Berkery Noyes finds the same split on separate 2023–25 data: 2.6x for $10–160m deals against 5.4x above $160m. A $19M-revenue company with a $70–110m enterprise value lands in the $50–100M band.
The binding constraint is not the cycle. It is deal size, and the discount has been stable across a decade of transactions. Our 9x sits above the 75th percentile of all software M&A including mega-deals, and well above the 90th percentile for deals of the size we actually produce.
There is a structural reason it is unlikely to re-rate. Private equity software platform buyouts fell to a decade low in 2026 — 41% of deal value against 71% in 2025 — while add-ons roughly doubled as a share. A $10–20m ARR vertical software company is no longer a platform; it is an add-on. Add-on buyers price off accretion math and their own platform's trading multiple. They do not pay scarcity premiums.
| Exit case | Multiple | Exit EV | Gross return |
|---|---|---|---|
| Paper's 2020 example | 9.0× | $175M | 78× |
| Rule-of-40 + category leader | 7.5× | $144M | 64× |
| Vertical SaaS M&A median | 5.8× | $111M | 49× |
| Market median today | 4.0× | $77M | 34× |
The paper's own case repriced: $2.25m total invested, $19.2m run-rate revenue at exit. Returns are gross multiples on invested capital before ownership, fees and dilution, exactly as in the original. The 5.8x case is the 2025 vertical SaaS M&A median; the 7.5x case requires category leadership plus Rule of 40 compliance plus growth above 30%.
This is the section where the honest revision is also the reassuring one. Substituting a realistic multiple takes the modeled return from 77x to somewhere between 34x and 49x. That is a very large reduction and still an excellent outcome, and the thesis is more credible stated that way than it was at 77x. What has to go is the pretence that 9x is a base case.
Base case exit for a $15–20m revenue vertical software company: 4.0x revenue (market median), with 5.5–5.8x justified by genuine vertical focus and 7.5x+ reserved for an explicitly labeled upside case.
Remove the IPO from the exit ladder entirely. Median LTM revenue of the 2025 software IPO cohort was $616m against our $19m threshold, six pure-play SaaS companies listed in 2025 against twenty-seven in 2021, and none at all in the first two months of 2026.
The original has no treatment of holding period, and that omission is now the largest single risk in the model. Hold periods have stretched from roughly four and a half years to over seven. Median DPI for the 2018 vintage sits at 0.15x against a historical norm of about 0.7x by year eight. Fewer than half of the venture funds Carta tracks have returned any capital at all. The secondary market prices venture NAV at 78 cents on the dollar — which is the market's own opinion of the marks.
Against that, and genuinely in our favor: the sub-$100m software M&A market is liquid. SaaS transaction counts hit an all-time record of 2,698 in 2025, up 28%, and 2,784 on a trailing twelve-month basis through the second quarter of 2026. Private equity and venture-involved buyers are 59% of it. Search funds provide a floor bid at a $16m median purchase price. Vertically focused targets rose to 54% of deals from 46% a year earlier. The exit market for $5–15m ARR software is not frozen. It is busy, and it clears at roughly half the price we assumed.
The 2020 paper opened with a hundred pages' worth of macro argument compressed into five: the industrial revolution, total factor productivity, the shift from manufacturing to professional services, and a prediction about inflation. Those deserve a scorecard too, and one of them is the worst call in the document.
| What we said in 2020 | Verdict | The record |
|---|---|---|
| Digitization would restore early-1900s total factor productivity gains, roughly 3% a year | Contradicted | US private nonfarm TFP growth averaged 1.0% over 2019–25 and 0.8% in 2025 — better than the 0.6% of 2007–19 but below the ~1.5% of the 2000s we used as the unimpressive baseline. The San Francisco Fed puts the probability of a high-TFP regime at 21%. |
| (Implicit) the productivity mechanism is real and observable | Partly confirmed | Labor productivity growth did accelerate, from 1.5% over 2007–19 to 2.2% over 2019–25 — back to its post-war average. The SF Fed puts the probability of a high labor-productivity regime at 57%. The gains are visible in capital deepening, not in efficiency. |
| High productivity would mute inflation; deflation was the risk from COVID stimulus | Contradicted | CPI hit 8.0% in 2022, a 41-year high, within eighteen months of publication. Cumulative inflation 2021–25 was about 24%. Headline CPI was still 3.4% in July 2026. Wrong in direction and badly wrong in magnitude. |
| Manufacturing 32.4% of employment in 1910, 8.7% in 2015; professional services 3% to nearly 30% | Unverifiable | Manufacturing is 7.94% as of August 2026, so the trend continued but decelerated sharply. The professional services figure does not survive checking: the BLS professional and business services supersector is 14.2%, and reaching 30% requires adding private education and health. The corrected reading is 3% to roughly 14%, which makes the same point less dramatically. |
| Extreme poverty collapsed as the industrial revolution spread | Confirmed | 1.5bn fewer people below the line than in 1990, though COVID caused the first substantial rise in a generation (+50m, 2019–20) and progress has stalled: 10.4% in 2024 to a 10.0% nowcast for 2026. Note the World Bank moved the line to $3.00/day in June 2025, so pre-2025 figures are not comparable. |
The inflation call is worth dwelling on for one sentence, because the reasoning was not stupid and the outcome was still wrong. We argued a medium-run supply-side proposition and the world delivered a demand-and-supply-chain shock that no productivity trend was going to absorb. That is a real distinction, but we did not draw it at the time, and a forecast that requires a later caveat to survive did not survive. What is quietly interesting is that the mechanism may finally be showing up four years late: core inflation has come down to 2.5% while output grew 2.5% and hours grew 0.4%.
The one macro claim in the paper that has strengthened without qualification is the simplest. Business investment in software rose from $478bn in 2020 to $755bn in 2025 and an annualized $817bn in the second quarter of 2026 — from 2.24% to 2.45% of GDP, compounding at roughly 1.5 times the pace of nominal GDP straight through the multiple compression, the rate shock and the exit freeze. Whatever happened to software as a trade, software's share of national capital formation never stopped rising.
The seven-step framework in the 2020 paper is the part we would change least. Value proposition, market depth, normative metrics, sales efficiency, stabilized cash flow, competitive analysis, team. Each step still asks the right question. What changes is the answers we would accept, and one addition.
| Metric | 2020 paper | 2026 revision | Why |
|---|---|---|---|
| Gross margin | 70–90% | 65–85% blended, with AI-delivered revenue underwritten separately at 50–60% | AI products run 53% and are 42% of software revenue; inference is ~23% of total spend at the scaling stage |
| Cost of sales | 10–15% of revenue | 15–25%, with an explicit inference line | COGS is now variable with usage, not fixed hosting |
| Stabilized net cash flow | 45–50% of revenue | 45–50% held, but only at ≥80% gross margin and ≥95% gross retention; 25–35% otherwise. Say whether stock comp is in or out | Qualys 45.5%, Check Point 43.0%, Dropbox 36.9% at ≤10% growth. But replacing churn at 84% retention costs 21–32% of revenue |
| Net dollar retention | 105% treated as normal | 101% is the median. Underwrite 100% and treat 110%+ as a finding | 105% was the 2021 peak, not a norm; 100% was the median in 2019 |
| Gross retention | not specified | The master variable. 84% median; 95%+ to underwrite the margin ceiling; below 80% is disqualifying | Sets the achievable cash-flow margin directly, at 1.3–2.0 points of margin per point of retention |
| New-logo CAC ratio | $1.34, judged too low | $2.00 median, $2.82 fourth quartile | Rose 14% in a year while blended CAC fell on expansion mix |
| Rational ceiling on CAC | $4.50–$7.00 per $1 ARR | $2.20–$3.00 | Rebuilt on 22% cash-flow margin and a 4.5x exit |
| Discount rate | 6.87% | 9.33% (range 7.7–9.3%) | Risk-free +289bp, credit −93bp; all rates at 3 Sep 2026. Raises the growth needed to justify 10x from ~10% to ~21% |
| Exit multiple | 9x revenue | 4.0x base, 5.5–5.8x vertical, 7.5x+ upside | Median for $50–100m EV deals is 3.7x — the one input with no conditional defense |
| Rule of 40 attainment | "20% or fewer" | Confirmed on EBITDA (15–17%); 46% on an FCF basis | Specify the basis — it swings the answer threefold |
We are adding an eighth step, between sales efficiency and stabilized cash flow. The question is simple: what is this contract a claim on? If it is a claim on the customer's headcount, it is exposed to the one line item every customer is actively cutting, and the evidence says it retains thirteen points worse. If it is a claim on work volume, transactions or outcomes, it grows with the customer's activity rather than their payroll.
1. What unit is priced, and is that unit growing or shrinking at the customer?
2. What share of revenue is seat-based today, and what would gross retention be if seats fell 15%?
3. Has the company attempted a pricing change, and what did it learn? Thirty-seven percent of AI companies plan to change pricing again within twelve months — the ones who have never tried are the concern.
4. If AI-delivered features are priced inside the subscription, what is the inference cost per account, and what happens to gross margin at 3x usage?
Three things in the 2020 paper we would write again, word for word. The first is the primacy of the value proposition, tested by trying to prove the null rather than by admiring the pitch — in a market where building a demo is nearly free, the discipline of asking whether the customer's problem is worth cash is the whole job. The second is the insistence that market size means early-adopter market size, which is more true now that there are more competitors chasing the same innovators. The third is the SaaS return on capital metric — new ARR booked in the period over total capital raised less current cash — which has aged better than anything else in the document, because it is indifferent to multiples.
All figures were re-sourced to primary or named-analyst publications between 1 and 5 September 2026. Where two credible sources disagreed we have said so in the figure notes rather than picking one. Six cautions on method are worth stating explicitly.
| Area | Sources |
|---|---|
| Valuation and public markets | Software Equity Group Annual and Quarterly SaaS Reports (2022, 2026, 2Q26); Clouded Judgement (Altimeter), weekly, Dec 2020 – Sep 2026; Meritech Software Pulse, Jan–May 2026; SaaS Capital Index; Aventis Advisors SaaS and software multiples; Multiples.vc, Aug 2026; First Analysis vertical SaaS, Jul 2026; Nasdaq EMCLOUDT fact sheet; Slickcharts. |
| Private operating benchmarks | Benchmarkit / Ray Rike 2024, 2025 and 2026 B2B SaaS benchmarks; SaaS Capital private growth and retention benchmarks; High Alpha 2025 SaaS Benchmarks (successor to OpenView); KeyBanc Capital Markets / Sapphire Ventures Private Company SaaS Survey, 2021–2025; ChartMogul retention reports; Bessemer Cloud 100 Benchmarks. |
| Rates and credit | FRED series DGS3MO, DGS2, DGS5, DGS7, DGS10, DGS30, GS10, FII10, T10YIE, DBAA, BAA10Y, BAA10YM, SOFR, CORBLACBS; Rogoff, Rossi and Schmelzing, "Long-Run Trends in Long-Maturity Real Rates, 1311–2022," American Economic Review 114(8), Aug 2024; PitchBook-NVCA Venture Monitor, Q1 and Q2 2026; Runway Growth / PitchBook Venture Debt Review 2025–26; Federal Reserve FEDS Notes on private credit, Aug 2026; ABF Journal, May 2026; Raymond James BDC Market Update, Aug 2026. |
| AI economics | ICONIQ State of AI 2026 and bi-annual snapshot; ICONIQ State of Go-to-Market 2026; Bessemer State of AI 2025; Epoch AI inference price trends; METR developer productivity RCT, Jul 2025; GitClear Maintainability Gap, Jan 2026; Google DORA 2025; Stripe AI economy data; company filings and earnings materials (Salesforce, ServiceNow, Microsoft, HubSpot, Zoom, Chegg). |
| Exits and macro | Aventis Advisors software M&A dataset (1,325 disclosed transactions); Berkery Noyes 2025 software trends; Carta VC fund performance Q1 2026; Jefferies 2025 Global Secondary Market Review; Stanford GSB 2026 Search Fund Study; Gartner IT spending forecasts (Apr 2021 – Jul 2026); BLS Total Factor Productivity (Mar 2026), Productivity and Costs, Employment Situation (Aug 2026) and CPI (Jul 2026); San Francisco Fed Economic Letter 2026-14; World Bank global poverty update, Mar 2026; BEA / FRED software investment and GDP series. |
This is a companion to Investing in Software? You bet your assets. (Rev. 202008), in the GSV Investment and Returns series, and is meant to be read with it. The original remains the statement of the framework and is not superseded. This document restates the conditions on two of its conclusions and replaces the inputs to the rest. Where the two disagree on a figure, this one governs.
Read alongside it: Something Ventured on venture in a portfolio, and To Fee or Not to Fee on fee structures and returns.
This addendum is published for discussion and is not investment advice, an offer or a solicitation. Figures come from third-party sources believed reliable but not independently audited; several are estimates or forecasts and will change.
Six years is long enough to find out which parts of a thesis were reasoning and which were the prevailing weather. The framework is intact. The two claims the 2020 paper is most often argued with — a 10x revenue multiple and a 45–50% cash-flow margin — are both sound, and both were published without the condition that makes them true. Supplying those conditions is most of what this addendum does. One conclusion is wrong at the level of price, and no amount of framing rescues it.
What held, and what it depends on. A 10x revenue multiple is defensible from first principles, then and now. What the original omitted is the growth rate it requires: about 10% on 2020 inputs, about 21% at today’s discount rate. A well-run software company can drive 45–50% cash-flow margins in a no-growth state — the condition the original omitted is that replacing churn is not discretionary. At 96% gross retention, standing still costs five points of revenue and the ceiling is real; at the 84% median it costs twenty-one to thirty-two points and the ceiling is fiction. Retention is the condition — and the paper already had retention at the center of its cash-flow-stability argument. It simply never connected the two.
What did not hold. The discount rate moved 246 basis points and no framing absorbs that. The exit multiple is the genuine casualty: 9x is not available at $19m of revenue, has not been for a decade, and the constraint is deal size rather than cycle. And the relative-returns claim failed as published, because we attached a sound proposition about the asset to an index that had bought at 17.7x. Underneath those, one pattern is worth naming: every input the original chose — a 0% real rate, 105% net retention, the top of the cash-flow band, a 9x exit, a two-year index history — happened to be the most favorable observation available at the moment of writing.
Where that leaves an investor today. Better placed than in 2020, and the arithmetic says so plainly. Entry multiples are roughly half what they were. The exit market for sub-$100m software is at a record 2,698 transactions. Capital is scarce for the companies that need it. And the operating discipline that separates a 45%-margin business from a 25%-margin business is now measurable in advance, in a single number — gross retention — that any diligence process can obtain in an afternoon.
The 77x worked example is gone; honestly rebuilt it is 34x to 49x, which is a better number to underwrite because nothing has to go right that has not already been observed. But the deeper point is the simpler one. If you buy at a disciplined multiple and sell at one, your return is the company’s revenue growth. That was the 2020 paper’s real claim, it is the one that has survived every test in this document, and it is the only one that was never about the market’s opinion in the first place.
Golden Section publishes research on market dynamics, vertical SaaS, fund structure, and the intersection of AI and enterprise software.
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