I've tried using basic AI completions before and found that the signal-to-noise ratio wasn't quite good enough for my taste in my use cases, but I can totally understand it being good enough for others.

My comment was more about just asking questions on how to do things you're totally clueless about, in the form of "how do I implement X using Y?" for example. I've found that, as a general rule, if I can't find the answer to that question myself in a minute or two of googling, LLMs can't answer it either the majority of the time. This would be fine if they said "I don't know how to do that" or "I don't believe that's possible" but no, they will confidently make up code that doesn't work using interfaces that don't exist, which usually ends up wasting my time.