To be honest I suspect they wanted to do this before, but the power mods wouldn't allow it. I definitely remember the staff posting a proposal to allow second chances for closed questions, and it was downvoted to hell by the mods. They presumably got scared because they were getting a lot of free labour from the mods (even if it probably wasn't exactly the kind they wanted).
Now StackOverflow is dead the mods have no power, so they are free to make changes.
That is about their AI service. If you don't use that then who cares?