As for the confusion / chaos around multiple/redundant/competing communities and so on...that will get better over time as people figure things out. Honestly it's not that different than reddit with all of its splinter subs like "true-" whatever.
That's true for just the duplication problem, but the defederation / shadow banning issue is not one that reddit has and is pretty confusing and poor user experience for new users coming in.
Yup. People gonna have to move.
Remember when people said that climate change would cost us trillions of dollars? This is why.