IMO, part of having a social platform actually retain quality long-term is not ever making it too good. You've got to discourage the masses of people who mainly

IMO, part of having a social platform actually retain quality long-term is not ever making it too good. You've got to discourage the masses of people who mainly post memes, puns, and jokes to everything if you want the people who actually make insightful posts to stay around and write posts, and for them to be visible and upvoted. Reddit is kind of an example of both - how low-quality the discourse is in big default subs and on their new interface and app, and how quality is still retained in some places with much smaller memberships with users who mostly prefer the old UI or mobile apps that are more friendly towards reading and writing longer posts.