Threadiverse? I didn’t hear this name, I think it can be confused with Meta’s threads.net. But I don’t like Lemmy, and don’t want the network to be named after it. For example we don’t call Fediverse as Mastodonverse.
As for Mbin, UI looks good, a feature showing similar threads is useful. But it is quite new yet, many important options are missed in the preferences yet.
Yes, they should ideally. But it’s hard to properly implement them in a way that will guarantee anonymity and be sybil-resistant at the same time.
An offtopic but federation is not working on fedia.io right now.
No.
Mastodon mindlessly copies big “horizontal” social network services, but they rely on algorithms a lot. Without algorithms, I think that platforms with categories and communities are better. That’s why before the major social networks, forums were quite popular for discussions.
Sorting order preferences.