I agree with your general point: there is a tendency to group not least these deals together without distinction as confirmation of a pre-existing belief that the AI bubble is soon to collapse. The latter certainly might be true, but we should be careful about too quickly deciding what evidence supports it. I am inclined to strictly separate: (a) the NVIDIA deal as a vendor subsidizing one of their largest clients, which perhaps signals market weakness; from (b) the AMD deal as a non-market-leading vendor trying to entice a new enterprise client, who will only be able to use AMD's chips for serious training after significant (and risky) collaboration to improve their product offering.

This distinction is important to me because I see more concrete evidence for a possible material drop in NVIDIA's business short- to medium-term than a collapse of the sector as a whole. The chips act clearly shut them out unexpectedly from their second largest market and now it seems likely that Chinese chips will be competitive for training sooner than expected. Indeed, if Chinese AI firms are suddenly able to obtain even a roughly approximate product at considerably less cost, OpenAI will suddenly find themselves at a cost if not compute disadvantage to their Eastern competitors. It isn't a surprise, then, that OpenAI is now looking to reduce their present vendor lock-in with NVIDIA.

Overall, it's not great for the latter if they lose access to their second largest market, suddenly have viable competitors in their home market, and either lose some of a major client's business or have to significantly reduce pricing to retain it.