I have a pretty good feeling that lemmy.ml is going to be the next reddit.com. Sure, there's different instances of the federation, but this one seems more developed than most of the others.
you can mention or message anyone on any website using their address.
So someone on a Mastadon community of servers could ping me in their server/website and I'd get a notification?
And can posts on one Lemmy server also show up in another Lemmy server? Like could a post be made here, braodcast into the lemmy-verse, and appear on another Lemmy website?