I think a lot of people here would agree that AI/LLMs got them off of stackexchange (not just stack overflow) and it's refreshing to not have to deal with the moderation's instant "did you google" / "duplicate question". These new contributors will learn and switch over to chat.com soon enough
That's not how Stack Exchange works, though. You don't have to register for a new account every time you leave an answer. The replies were all from new accounts, not established ones. I don't think it has anything to do with the amount of time since the question was asked.