@snwh @wilbr this is something that's been discussed at length in the github issues for Mastodon - searching for "migratory accounts" should unearth the bulk. There are some bits of how the federation works that make it complex in a few ways, but it's a popular desire and needs some better solutions.
(i say from my mastodon.social account, because even though i have accounts on three other instances, i just like this one)
@snwh I tried to explain the migration situation here briefly: https://troet.mortzu.de/@cvigano/100576246428730677
TLDR: this is a thing that has been built into Mastodon to some degree, haven't tried it out yet.
Follow friends and discover new ones. Publish anything you want: links, pictures, text, video. This server is run by the main developers of the Mastodon project. Everyone is welcome as long as you follow our code of conduct!