Yes Friendica also has threaded conversations.
I recently tested Friendica for FGD extensively, plus point is that ActivityPub support is a first class citizen there compared to the rather afterthought way it is handled in Hubzilla, but overall it feels much less polished and the only modern theme is mostly unmaintained and an ugly hack. Threads in Friendica are also visually more obvious but at some point the theme breaks rather badly along the tread tree. Hubzilla puts linear forum style replies more prominently but since the recent version you can actually reply to specific posts, but it is only visible by a small double arrow that links to the post. But overall I decided Hubzilla is the better option.
fluffrabbit {l Wrote}:what is the structual difference between a microblogging social network and a non-microblogging social network?
Hmm... I guess like the above quote was outlining. Microblogging (Twitter, Mastodon etc.) is UI wise geared towards short blurbs of text as with a shout-box, and while comments are possible they are quite hidden away and more of a personal feedback mechanism for the original author than a multi-user conversation. I think this creates a structural problem and everything is out of context but people still insist on posting very context sensitive things. In the end microblogging works best as a sort of RSS feed aggregator like system, where comments are pretty much limited to posting thumbs-up or additional related links or so.