People’s resistance to change is quite strong, even if they have good reason to leave and lemmy/fediverse are great alternatives the fact is that in terms of UX lemmy can be quite different and takes some time to find and rebuild a list of communities to join, specially since you can have the same community on different servers (i.e. technology on beehaw vs technology on lemmy.world) and just this fact means a learning curve for people that for the most part don’t like change.