AI didn't do it to SO. SO's new ownership did it to SO. It's a hostile place with or without AI.
But to be honest I expect that would have just delayed its death. AI is so good now I think I'd use it even if Stackoverflow was really friendly.
My attempts at discussing AI related questions with AI itself have been pretty frustrating, especially in the early years, since they are either just uninformed about what's currently going on in the AI space or recite random blog posts of questionable value, often they couldn't even tell what they themselves are capable of.