I don’t count forums the same as modern social media. The are social places of course, but much more tight-knit, much less algorithmically ratfucked. Even 2003 Myspace and 2004 FB were much better places than what they have metastasized into.

forums dont really count, they are pretty niche, i think the closet one would be e-world, and the Y/a. I happened upon a location specific forum, and they go back to late 2000s.