The AI Layers War

Every major technology platform transition in history has followed the same structural pattern. A new capability emerges. Companies rush to build at the most visible layer — the user-facing application — because that is where attention flows and where early revenue is easiest to see. But over time, value doesn’t stay at the top. It migrates down. The companies that win are rarely the ones that built the best application. They are the ones who owned the layer beneath it.

We saw it in the PC era. WordPerfect and Lotus built great applications. Microsoft built the operating system underneath them. Thirty years later, every application developer was paying Microsoft’s tax.

We saw it in the web era. Yahoo and AOL built the best portals. Google built the distribution layer — search — beneath them. Every web business that came after paid Google for traffic. Mobile was the same: tens of thousands of app developers competed ferociously on thin margins while Apple — as explored in the interface layer wars reshaping consumer tech — and Google took 30% of every transaction from the platform layer below.

Cloud repeated the pattern: SaaS companies built brilliant products on infrastructure — as explored in the economics of AI compute infrastructure — they didn’t own, and AWS extracted its margin quietly from every one of them.