Have +any+ social media platforms managed to recruit new generations of users, after the first generation? It seems that each new generation starts its own new community, rather than joining an existing platform.

Perhaps YouTube is an exception if we call that a social media platform (but maybe Tik Tok is replacing it)? Are there any others?

@owen arguable that Usenet really survived about 25 years, admittedly with a much smaller user base. When I was on uk.gay-lesbian-bi it was fun when a new batch of Uni students discovered it every year!