Which forum engine supports tree comments?

Question

CMS

We need a forum engine that supports tree-like comments.
I would like, ideally, as in habré or dirty, for example.
I think that multi-page forums with useless information about the username in each comment is an extra waste of space and I want minimalism with the maximum density of information.
I will add, I looked at the answers to a similar question here, but it is the forum that interests me, and not the collective blog.
A team blog is hard to structure and categorize, but pagination in topics and no response tree is a thing of the past.

Answer 1

What do you dislike about Disqus?