Yep. Tho how many of those are redundant communities across multiple instances. Still, very exciting times for the lemmyverse.
I think the big killer feature (if this can even be done) is to associate like named communities from different instances. Like destiny@lemmy.world <--> destiny@lemmy.ca marry up and start subscribing/replicating each other's content.
That would be great. Maybe one could be merged onto another so you wouldn't even have to host the content twice unless you want to.
Reddit has duplicates sometimes too, it's just a bit more likely do to the two-component namespace and possible defederation here. With any luck one of a pair will become dominant the same way.