Why do you imagine this would change _anything_?

There's a voluminous amount of code and documentation on how to build and run LLMs. You can build your own chatgpt literally in a weekend and run it on a home server, based on publicly available models.

If OpenAI and Anthropic literally evaporated overnight, there would still be Chinese labs training and releasing new models.

Do you think that's going to erase every copy of "Attention is all you need"?