StackOverflow initially had an interesting idea of putting metrics on things, and unfortunately humanity's penchant for "what gets measured is gamed" was amplified and devolved into a hive of HOA Karens looking for infractions of the rules.

I'll bet that if you "relaunched" a SO-like system and removed all human-visible "points" or "scores" you could achieve a less toxic environment. The only "ranking" is implicit based on your topical subscriptions.

Then again, you could "relaunch" the "relaunch" and "AlphaGo-ify" a bunch of AI agents to compose the dialogs and threads without any human interaction at all. I guess we're on our way already to building Culture minds.