Fediverse: All the (ActivityPub-based) federated services with at least some degree of interoperability between each other
Threadiverse: Subset of fediverse focused on threads-based discussion, like link aggregation/forums-style (as opposed to i.e. microblogging)
Lemmyverse: Subset of threadiverse specifically running Lemmy (as opposed to i.e. Kbin)
Lemmyverse doesn't really make sense, as it would all be visible from Kbin instances (unless they are all defederated).
What would make sense is a term for the "microblogverse", referring to all the posts from Mastodon/Miskey/Kbin/etc. This makes up the majority of the Fediverse, but it's mostly invisible to Lemmy users.
As a Kbin user, microblogs definitely are not all the posts we make here. We can both microblog through "Add new post" and make a thread through "Add new link", "Add new thread", and "Add new photo".
In practice, it's Lemmy and Kbin.
More theoretically, it's the part of the Fediverse that deals with threads rather than posts: You share some sort of content (text, images, a video, a link) along with a title, and people comment on it. The most common content type in the Fedverse is posts/microblogs, which it what Mastodon operates with. These posts are generally not visible from Lemmy, meaning that the majority of the Fediverse is invisible from Lemmy; what you see from there is only the "threadiverse" part. Kbin seeks to bridge the two.
You can view threads in Mastodon, but they appear only as the text of the title along with a link to the rest of the content. People can of course comment as normal.
To me, it's the parts of the Fediverse that take the format of forums/Reddit
So far I think that's mostly Lemmy and Kbin
Yeah it's Lemmy + Kbin. I'm not aware of any other federated link aggregators (read as Reddit clones), but if there are they would also fit.
I believe Mastodon would be included as well, basically anywhere you can post with comments and has implemented the ActivityPub protocol.
The three -verse terms I've heard in use are:
Lemmyverse doesn't really make sense, as it would all be visible from Kbin instances (unless they are all defederated).
What would make sense is a term for the "microblogverse", referring to all the posts from Mastodon/Miskey/Kbin/etc. This makes up the majority of the Fediverse, but it's mostly invisible to Lemmy users.
As a Kbin user, microblogs definitely are not all the posts we make here. We can both microblog through "Add new post" and make a thread through "Add new link", "Add new thread", and "Add new photo".