This is also why many communities have failed to launch on migrating off of Twitter. They don't have a ready-made, prepped, and universally agreed upon landing site, and intersectionality of communities prevents them from actually finding one, so they're all individually faced with the prospect of leaving their online communities and starting over, or staying put.

I sit on the periphery of most of my interest groups. I'm a loosely bound valence member, and many of my interests are also just well represented here in the Fediverse, so setting up shop here just wasn't an issue. But for people who are more tightly bound, it's going to feel like there are overwhelming barriers to leaving.