

I just prefer fediverse, because it refers to the common network of apps and services speaking the same language: activitypub. There’s not really any such thing as the “threadiverse”, because lemmy can talk to mastodon, friendica, peertube, discourse, gnusocial, plerome, wordpress, lotide…
A lot of these have communities just like lemmy, and choosing to layout comments flat vs in a tree, is entirely a UI consideration for many of them. So if the thing distinguishing “threadiverse” is just comment trees and communities, then a lot of fediverse services already have those.
A lot of the above have communities in various forms, and they predate lemmy.