Offline, people have always tended to come together around common interests and values. My wife and I, for example, are part time performing magicians and we're a member of a local magic group that meets IRL.
Prior to what we have come to call "social media", existed forums. Forums were this wonderful utopian paradise of yesteryear where people engaged in long form discussions, often heated but mostly civil, about special interests that they cared about.
The term "social media" didn't start to catch on until the news feed was a thing. That was the "contribution" of both Facebook and Twatter and it was a big PART of what changed everything.
The other factor was the so-called "mobile revolution."
Forums are great when you're at a keyboard. They start to lose their appeal when you are engaging using a small touch screen.
What you are describing sounds like people returning to the state of the world as it existed before social media. Where people come together around common interests and values instead of using the news feed where you get fire-hozed with random shit that "the algorithm" thinks might trigger you into engaging with it.