@Widdlywham I've done this once before. You can set up the old account to forward people to the new one so if someone tries to use the old address they'll still find you (assuming the old server is still up).
This process is a little clunky but you should only have to do it if there's a problem with the instance you chose -- it's getting shut down or you don't like the moderation policies.
Given that account migration essentially doesn't exist on any other platform, I am really happy it's there at all. I think that portability is a key feature of mastodon.
@huxley Clunky is an understatement 😂 but thank you for the info I'll keep that in mind