It's not moving the instance thats a challenge; all of the data is tightly coupled to a given homeserver domain, which AFAIK can't be migrated to a new domain without hacking things 😔
I've never had to migrate from their servers but moving our nostr:npub1gvmc3nvmjekx7e0qlkeaqw2cqypvtqdcg4ljuz0wfj3zxjnnauys3ngk9f from one VPS to another wasn't bad at all. It was more or less a DB and a media dir.
It's not moving the instance thats a challenge; all of the data is tightly coupled to a given homeserver domain, which AFAIK can't be migrated to a new domain without hacking things 😔
Ahh this makes a lot more sense now!