For me, the best use case for AI is finding things quickly - for example, I forgot the formula for compound decay, can you remind me what it is? Or, is there a library in Python that will do x so that i don't need to reinvent the wheel?

That is, as an accelerator for work that I will then do myself.

I've found vibe coding is still too unreliable to be workable. Save only for small things like, let's say, one-off functions or website components. But for making entire systems that work well, it has some ways to go.