There is some significant amount of users here that fully / mostly abandoned social media and pretty often are in some kind of a post-reddit-lurker limbo, plus their age is around “I have a partner / family / job / hobbies / things in life I care more about than passionately posting / moderating online”.

Probably. I’m always surprised by the lack of activity on !parenting@lemmy.world, but I guess most parents are probably busing actually parenting