I am new and trying to understand how Lemmy works. I am posting this from my lemmy.world account, on a lemmy.ml community. It seems like you can read, post, subscribe to whatever community outside of the instance you’re registered with. So… Why register on lemmy.world vs lemmy.ml or any other instance, if all communities are accessible to everyone?
It depends of where the communities you’re subbed to are hosted. Like currently a lot of communities are hosted on lemmy.ml. If it goes down a lot of communities will still be unavailable but you can still browse the rest.