I have a strong feeling that no new languages will get adopted at all, now that it's important for AI to be proficient in speaking them.
I've been suspecting this myself and its probably the biggest thing I dislike about ai having taken over the proffession.
The best AI models at this point are perfectly fine handling new languages and frameworks and stuff - as long as you can point the llm to some docs and some example code it's not gonna do noticeably worse than it would at another language.