That's a very tall claim, and one that I personally doubt. When it comes to refactoring old code with unclear requirements and inconsistent style, I have not seen AI do well. Of course, these things are bad, but that's the reality of most code out there - maybe you're lucky enough that you don't have to wade through that stuff.

It makes my life way better and I will continue to use it, even in the situations that you claim it doesn't work.