I'm the first to admit, I got a lot of search results that pointed to answers I found valuable on SO. I answered questions the best I could and always tried to be helpful.
I have no actual SO "questions asked", 1000 "answered" and 15k in "rep". I tried my best. I would never have actually asked a question and open myself up to the abuse fire hose.
SO killed itself in my opinion with overzealous power users with 10s of thousands of rep points to burn and an axe to grind. I know it is a dead horse at this point, but the new user experience was terrible and still is unless you choose "advice" rather than a traditional question.
AI was just the euthanasia. I am sure there are lots of people, not just me with the opinion that AI has never been rude to me when I ask for help.
In 2 out of 3 cases, the responses I received to my questions were poor, wrong, snarky, or generally unhelpful.
I still believe a platform like that would be useful: something closer to MDN Web Docs, but with a Q&A mechanism. It should exist as public-interest technical infrastructure funded by govs, not as another asset to be squeezed until the community that made it useful has nothing left to give and everyone was worse off apart from the owners.