It still has some value today, as sometimes you can find useful information on SO, but its peak days are long over and I don't see how it can manage to come back, with or without AI slop. It would basically require a lot of re-design and some things that never worked, such as the karma system, should be changed. Also moderators - they kill sites. That happened to reddit - I gave up after censor-mods constantly restricted everyone.
The normal day to day devs just don’t have the need to go to stackoverflow anymore.
One would have to explain both consequences or dismiss it as coincidental.
FWIW I rarely have the need to ask questions at the programming level to anyone anymore. It’s just not the type of thing I bring up or anyone else. We now talk about architecture and company direction.