Idea: if you mod a community on a lemmy.somewhere you should be able to migrate it to lemmy.elsewhere which would include all post & comment links being forwarded and subbed users having their subscription updated to reflect the new location.
I’m aware this would be a way down the road as user account migration alone is still not great but it would be a great feature for the fediverse to have to avoid centralisation and mod/server admin wars.
I just personally wouldn’t want someone duplicating and creating me an account on another instance. Maybe if it’s developed in the future you just get a notification asking if you’d like to follow this community to such and such instance. At that point you get a prompt to accept or deny. I’m fine with that.