Comment by uludag

I don't even think you have to be on the frontier for LLMs to lose most of their effectiveness. Large legacy codebases with deeply ingrained tribal knowledge and loads of idiosyncrasies and inconsistencies will do the trick. Sad how most software projects end in this state.

Obviously LLMs in this situation will still be insanely helpful, but in the same way that Google searches or stack overflow is insanely helpful.