A potential federation with Threads (should Thread decide to implement it) would overwhelm Lemmy/Mbin/Piefed with millions of users (compared to the 40k monthly current active users), transforming those platforms into a threaded version of Facebook
There is no "main page", different instances host different communities and users, but everything is still connected by default (sometimes instance disagree and prefer to block each other)
Addendum: Yes we know that you think ml/hexbear/grad are tankies and or .world are a bunch of liberals but it gets old quickly. Try and come up with new material.
Different websites show the same content.
https://lemm.ee/c/fediverse@lemmy.world shows the community we are in from another instance, Lemm.ee.
There is no "main page", different instances host different communities and users, but everything is still connected by default (sometimes instance disagree and prefer to block each other)