I have a SO profile and I both contributed and used the site for some time.

I use the site from time to time to research something. I know a lot more about software than 15 years ago.

I used to ask questions and answer questions a lot, but after I matured I have no time and whatever I earn is not worth my time.

So perhaps the content would grow in size and quality if they rewarded users with something besides XP.

I don't use AI for research so far. I use AI to implement components that fit my architecture and often tests of components.