@juergen_hubert yeah, I think you're getting this exactly backwards.
#Mastodon/#ActivityPub makes it way too hard to move instances. It's unfortunately a core problem with this platform, but we shouldn't pretend it's not.
Other platforms like #BlueSky make it much easier, but #Fediverse is behind on this one.
We need to recognize that as a rough edge, a legit reason users might choose another platform.
For one thing, there is the issue of moving to non-mastodon instances on this platform.
For another thing, a lot of people complain about not having a lot of their stuff moved, weather through buggy instances or one instance not cooperating in the migration or whatever other reason.
It's unfortunately a core problem with this platform, but we shouldn't pretend it's not.
Mitra has at least got support for nomadic identity via ActivityPub in a development version.
(streams), a Hubzilla descendant by Hubzilla's and Friendica's creator, has had support for nomadic identity via ActivityPub in its stable release for months. It doesn't rely on it, though, because it uses Nomad for that.
Forte, a (streams) fork by the same developer, is the first Fediverse server application to actually rely on ActivityPub for nomadic identity. It's still experimental and a "closed alpha", though.
The building blocks of nomadic identity as implemented in Hubzilla, (streams) and Forte are being cast into ActivityPub FEPs such as FEP-ef61 "Portable Objects".
@volkris Speaking as someone who has moved Mastodon instances twice, I am curious: In what way do you find the process difficult?