This worries me the most. Will all the tools we used before AI become obsolete and disappear. Is Ruby heading for the graveyard because LLM’s seem to prefer Python. If we aren’t careful we could end up with a lot less choice of tools.

Yeah, AI has really taken the fun out of niche languages for me. Not that Ruby is all that niche, but just learning different programming languages feels a bit pointless now since those are abstractions we built for people, not for bots. Sure, nothing is stopping me from writing code by hand for hobby project, but a big reason why I enjoyed learning new languages so much was precisely because of the productivity boost I might have gotten of that new language. It felt good to become an expert in domains few even knew about. Now, it doesn't matter if your app is written in Python, Ruby, Elixir, Rust, whatever, the AI can achieve it all the same.