One thing to keep in mind is that there is an active minority of users who are content generators who are much more likely to vote on stuff like that. Then there are a ton of mostly silent read-only users (most of whom don't even have accounts). If you inconvenience the mostly silent users who are just there for cat pics on their lunch break, some of them will suddenly put in the effort to complain. But they'll never build a community, you need the active users for that.
Yeah, its the tech-aware who have dumped Reddit. Unfortunately part of the magic was that it had grown to the point that if you went looking you could end up talking to anybody from a diesel engine mechanic to a paragliding instructor, not just a bunch of tech nerds. I think this'll be the sticking point, lemmy/kbin is still 95%+ tech nerds.
I think this wave just gave us enough of a userbase to start establishing the infrastructure for general communities here, not even really specialized ones yet. But those will provide escape areas whenever the next wave occurs.