I miss the decentralized web and phpBB forums. If you didn't like one community, it was super easy to find one you did.
Lemmy is a federated reddit-like community that anyone can host themselves. Here's one of the top servers:
https://lemmy.world/communities?listingType=All&sort=TopMont...
A lot of traditional forums are still active. :)
Just the hype seeking people left to Discord and Reddit to be able to lament about how these new places are awful and crying about phpBB and vbuletin being dead.