I use it for things I don't know how to do all the time... but I do that as a learning exercise for myself.

Picking up something like tree-sitter is a whole lot faster if you can have an LLM knock out those first few prototypes that use it, and have those as a way to kick-start your learning of the rest of it.

I have it do hard Leetcode problems and then read the code and have it explain parts I don't understand.