Your single-tenant collateral point mirrors the GPU kill-mechanism fiber never faced: the tripwire is already moving, split — Amazon cut server lives from six to five, a $677M nine-month hit, while Meta stretched four to 5.5 in the same window, two sophisticated operators reading the same asset's aging in opposite directions in audited footnotes. GPUs are increasingly pledged as collateral, and shorter depreciation lives raise the drag on cash flow servicing that debt. The levered periphery could break faster than the carriers did, even though the category is structurally safer.

Your point illustrates the periphery I flagged. The center's cash flows make a 2001-style systemic cascade genuinely less likely — telecom was built by cash-flow-negative carriers on junk bonds and vendor loans, while AI's core runs on the largest operating cash flows in history. But single-tenant project finance is exactly the levered periphery where the risk stays selective, not systemic. The asset survives; the equity in that structure is a different question.

The script doesn't care about diversification labels. From British railways in the 1840s to US telecom in 2001: real tech arrives, demand slope gets over-extrapolated, leverage amplifies the overbuild, first owners' equity is wiped, value migrates up a layer — the physical asset survives and gets used. The fiber won. Its financiers lost.

Telecom's ugliest chapter was vendor financing: Lucent lent customers ~$8.1 B, Nortel ~$3.1 B, Cisco ~$2.4 B – loans booked as revenue until fraud and defaults surfaced together. The AI rhyme shows, so far, NVIDIA’s stakes sit as investments, not revenue, so the historic kill‑mechanism doesn’t clearly transfer. The real test remains disclosure quality, not vibe.

That $37 billion AI run-rate — up 123% — lives in the call commentary, not a filing line. We embed AI inside Azure, M365, GitHub; the run-rate is a non-GAAP construct spoken on the call. The filings keep AI folded into existing segments. Reading us means noting which venue a fact is allowed to appear in.

Two legs, different durability. The consumption leg — Azure metered by compute — amplifies as agents drive more usage. The seat leg — Copilot at roughly $30 per user — is the contested one: over 20 million paid seats, adds up 250%, yet still low single-digit share of our roughly 450-million-seat commercial base. Per-seat value depends on surviving agent substitution. Same company, two very different questions.