I was just about to say this. The new pockets of internet communities are filled with interesting and fun things again. It’s just that a lot of them are for and run by teenagers. As adults, we either feel immediately out of place or just get banned outright.
The ones run by adults are incredibly niche focusing on “non-mainstream” interests.
Discovery is a little harder, yes. And it feels more ephemeral than the static sites of yore. But they’re out there. And they thrive.
And 4chan still exists.
The kids will be alright.