It is certainly fun to play. There's a bunch of chat bots out there, a lot of them are trash when run locally; and there's a lot that are just "circle simulators" where they take in what you said, modify it, and answer a question with a question.

I've not played with ChatGPT-4 (I don't feel as though I have an application where the "plebian" version won't answer the question I have) - but when I do, I'm sure I'll find something useful to do with it.