An instance is just a way to access Lemmy. Lemmy.world, lemm.ee, sh.itjust.works, feddit.uk, etc - you can use any of these to access Lemmy and interact with, and see, all the same content.
It’s a problem because most communities are hosted on lemmy.world at the moment, but if lemmy.world ever dies they’ll die with it.
An instance is just a way to access Lemmy. Lemmy.world, lemm.ee, sh.itjust.works, feddit.uk, etc - you can use any of these to access Lemmy and interact with, and see, all the same content.
It’s a problem because most communities are hosted on lemmy.world at the moment, but if lemmy.world ever dies they’ll die with it.