All this defederation drama reminds me of the old 90s/2000s forum days where communities where split into ever smaller groups over rather banal disagreements until you had like dozens of forums with ever smaller userbases and various grades of moderation policies and technical capabilities, often leading to complete data lass after some admins noticed that there’s actual work behind running internet services for lots of users. I worry the Fediverse is headed in a similar direction, though I hope I’m wrong.

You know, it reminds me of that as well but I have an opposite take. The forums I was most active on in the early 2000s were generally ones that had split from larger ones and had became smaller but much stronger and more personal communities as a result. You had the luxury of breaking off precisely because there was no expectation that one community would ever have a monopoly for a topic. Maybe my experience is unique, I don't know.

I can't speak for the specific situation here because I don't know anything about these instances. But the ability for people to split off after a terminal disagreement has generally struck me as a strong point to the voluntary federation we have.