Lemmy is being sold as a Reddit alternative. I for one want it to succeed at that. A fractured Fediverse however won't be able to entice anyone not directly affected by Reddit's changes to join, for the same reason why separate forums weren't able to survive once Reddit got traction.

Saying stuff like "it's a good thing admins from one instance can cut you off from all communities hosted on that instance, if you have your account on the blocked instance" doesn't track.