lemmy.world is the largest Lemmy instance by far and is causing growing concern that it’s causing the Lemmy-verse to become too centralized and strangling out smaller instances either intentionally (if .world defed’s from your instance you immediately start losing out on a ton of content/traffic) or unintentionally (people just post there by default leaving little content for other instances)

So now there’s ongoing efforts to try to balance things out a bit