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.
How about a Mirror option which goes deeper than just federation and allows communities to cooperate on designating a Primary and Secondary replica, and promoting a replica to Primary (thus demoting the old Primary to Secondary) would require mods on both sides to cooperate…