> their own GPUs

Everyone has critical risk on multiple parts of the supply chain. GPUs and Memory are just things OAI mitigated for.

Power - Bigger bottleneck than GPU or RAM perhaps, New Grid connected capacity is typically 10+ year timescale with lot of regulatory friction. Captive capacity is also quite constrained - now Gas turbines have 7+ year wait time.

There are plenty of hard constraints that OAI cannot easily solve either.