Nvidia has a huge stake in OpenAI, both in terms of them being one of Nvidia's biggest customers and also via direct investment. After HuggingFace was hacked and they expressed the position that they were the forgiving sort, for a price, there was a distinct possibility that HuggingFace would become a vocal shakedown artist that would start protesting at inconvenient times until silenced by more money, especially if they get hacked again. By complete coincidence, Nvidia took the one move that silences HuggingFace for good.

Nvidia isn't going to sue OpenAI. No chance.

Who will though? At this point it seems like a huge chunk of US economy growth can be attributed to AI. Bubble or not, I guess very few would benefit from bursting it?