Is it possible or does it present difficulties with federation?
I’m asking because today Vlemmy seems dead and people are speculating it has something to do with losing the domain name. So I want to know if there is a possibility the same server could come up again under a different domain but keeping the same accounts and content stored or if they will need to set up a new server and thus it’s just better to move on to another instance.
Absolutely. It should be trivially easy for the owner to get a new name and point it at the server if it still exists and is working. However, I understand that we know very few facts about the situation.
Don’t let that discourage you from having accounts on other instances. One shouldn’t get too tied to a specific one IMHO.
EDIT: Should be. Not sure what happens with usernames.