To my understanding, it's to separate the microblogs, blogs, etc. and just include the forum / threaded discussion style of the fediverse.

Nope. Not buying that one bit. Look up threadiverse and you get zuckerverse sites as the top results.

Searching for fediverse and the first result is https://en.m.wikipedia.org/wiki/Fediverse

You're both shipping for the zuckerverse.

Damn, and this even happens with DuckDuckGo too, I would expect it from Google but even DDG?

There was a poll about it recently, with some high-profile people (like creator of Mbin) saying they were adamant about using Threadiverse.

Other alternatives were proposed like Forumverse or Topicverse, or simply the Verse, but people don't seem excited about switching. Ooh, fediforums?

Some additional references:

1. https://szmer.info/post/349217
2. https://lemmy.blahaj.zone/comment/93840
3. https://discuss.online/search?q=Forumverse&type=Comments&listingType=All&page=1&sort=Old
4. https://piefed.social/post/718679

I am guilty of spreading the term Threadiverse around everywhere, though I personally don't care what term we use so long as we pick one and just go with it, which overwhelmingly (even if unfortunately) turned out to be Threadiverse.