Customers are increasingly wary of building their business on someone else's land because they've seen it happen too many times that once you're locked in the price goes up, or the company who is now your only viable supplier decides to enter your own market.
And at least if anyone can buy the hardware you'll have your own or have multiple competing providers you can lease it from. If you can only lease it and only from one company, who would want to touch that? It's like purposely walking into a trap.
Lock-in is a valid concern, but on the other hand, for many apps, it seems like this can be fairly easily mitigated? If you can swap in a different LLM, I don't think it matters if it's running on Google TPU's or NVidia?
Meanwhile, at the hardware level, TPU's provide some competition for NVidia.
This might be the source of the AI bubble burst, just like the 2000 bubble. Eventually someone's gonna raise the price to cover a bill and suddenly everyone looks at actual revenue and power bills , calculates within 6 months they'll not get their MBA turnip squeezed bonus and walk away