A personal anecdote from my previous place:

A junior developer was tasked with writing a script that would produce a list of branches that haven't been touched for a while. I've got the review request. The big chunk of it was written in awk -- even though many awk scripts are one-liners, they don't have to be -- and that chunk was kinda impressive, making some clever use of associative arrays, auto-vivification, and more pretty advanced awk stuff. In fact, it was actually longer than any awk that I have ever written.

When I asked them, "where did you learn awk?", they were taken by surprise -- "where did I learn what?"

Turns out they just fed the task definition to some LLM and copied the answer to the pull request.