> Javascript/Python is the best because there's so much code out there that the LLMs can train on, and LLMs can write lots of tests to make sure everything is correct. There's nothing to compile, so the LLM can iterate quickly.

My experience with Python is different. I noticed that my LLM (Claude) frequently gets stuck in cycles when coding larger features in Python. I'm also doing a lot of work in Scala, a language where much less code is on the Internet, yet Claude does way better, it hardly ever gets stuck at all.

My theory is, that while there is a lot of Python code on the Internet, a lot of that code is crap. This will trap LLM's into coding crappy solutions which will eventually bite them in the tail.

Also, I believe that, especially for larger codebases, a strong type system helps not just humans but LLM's as well.