If you're thinking, all we have to do is wait for OpenAI to re-scrape the web and re-train GPT on the new material, well... LLMs don't "learn" so much by looking at documentation, as by looking at examples. And a new tool is not going to have a lot of examples out there, simply by virtue of being new.
Aside, this is not going to stop people learning and using a language if it provides benefits. Not everyone is on the AI hype train. I personally couldn't care less - I don't trust any current AIs to write correct, bug-free code and so I just avoid them. Then again, I also don't trust most humans to write bug-free code and I tend to avoid them too. Formal verification should be the way forward, and this is why new languages, which can embed proofs, should continue being developed and improved, ignoring the AI hype.
When the AI can write code in formal verification languages, I might consider it.
The "Selfish Gene" strikes again.