But you know what I mean, right? The ones using intricate algorithms and tracking to keep you "engaged" and manipulate what you read and see
I'll also add that I'm not specifically opposed to banning minors from using social media. It would probably also be better if it was illegal for children to buy their own soda tbh.
I'm thinking that it comes down to one thing in particular: the absence of response notifications. There's only so much addiction you can get out of a page of text without so much as a bell icon.
There are a lot of communities built around things like Discord and Telegram. IRC existed long before these.
There are many websites that allow you to post pictures and have other people comment on them. DeviantArt pre-dates the vast majority of modern apps.
There are also vast numbers of iterations on forums.
At what point should you prevent people from finding and talking to each other?