I also was a teen as smartphones came into the mainstream.

I think that Facebook groups have largely taken the place of forums for online community with familiar users. On Lemmy and Reddit I feel the smaller subs tend to have more of the user recognition factor. On forums there are also the signatures and fairly prominent user panels next to posts that make a user stand out and be remembered. On Lemmy and Reddit there is only the username and it is not meaningfully different that the rest of a post header. I like that the user is less notable than the content they provide; it always was silly how a forum user would have a giant sig with all sorts of colors and animations closing out a single sentence post.