Old school forums (phpBB, vBulletin…) are dying due to moderation fatigue. Now it’s real-time chat &
Social media, like Facebook, Discord, Reddit, X and substack. The last 2 are not peer-to-peer topic type, so may not be counted as forum.
Technically I’m in 2 platforms. Here and Nextdoor. Because my neighborhood uses Nextdoor and I’m a community supporter.