The thing is though, the instance your create a community from only really affects who you interact with to recover your moderation team if everyone goes poof. Otherwise the instance essentially serves as a vanity domain for the community (think email). It doesn’t matter if lemmy.world is down to me at all. I can still post to its cats community using my sh.itjust.works account just fine. Anyone that isn’t on beehaw will see my posts with or without the origin instance of the community being online (because beehaw is defederated with my instance).
The thing is though, the instance your create a community from only really affects who you interact with to recover your moderation team if everyone goes poof. Otherwise the instance essentially serves as a vanity domain for the community (think email). It doesn’t matter if lemmy.world is down to me at all. I can still post to its cats community using my sh.itjust.works account just fine. Anyone that isn’t on beehaw will see my posts with or without the origin instance of the community being online (because beehaw is defederated with my instance).