As I've matured in my career I've gone to SO less and less, to the point where I mostly avoid it now. I use tools, languages, and libraries with which I am now highly familiar--perhaps more so than the average SO answerer, although I guess it would be arrogant to say for sure--and so the bulk of my questions are edge cases in my knowledge which are more easily answered by reading source code or specs.

I suspect this is one of the differences between people that find GPT helpful and people that don't--it seems much more potentially helpful when you are in a less familiar environment. In my work, when I run into unexpected behavior, if I knew what question to ask then I would probably already know the answer too. Until the day I can feed in an entire codebase and ask "What's wrong with this? vaguely gestures at everything", I don't expect that to change significantly.