There are several mammoths (instances) peacefully grazing on the same pastures (the social web), but the pastures are also shared with completely different species of animal. Perhaps they are single-user instances as no birds are landing on them; perhaps they are completely different pieces of the social web, such as Peertube or Lemmy.
I had to look up what those animals are, because i thought maybe their name is just the same as some other fediverse project. I looked for something like "two nosed white horned hooved mammal" and i did find it lol
I understood it to mean that this bird feels like this particular mammoth isn’t quite as comfortable but he has a lot of other mammoths to choose from, so he is free
Changing platforms will always somewhat inconvenient, as long as you have to rebuild your social graph else. This is maybe particularly the case on Mastodon, as you don't have a feed full of endorphin-maximizing content right off the bat.
Making the move to Mastodon does require a minimum amount of effort. I think it's good to be open about that. :)
What is comfortable is of course an individual consideration - personally I never felt comfortable on Twitter or Faceboook. @sxan