Misago seems promising to me. I am interested in creating a forum that hosts long-form discussion, and which involves more deliberation than a Reddit sub or the average Discourse forum. It would be a semi-academic forum. Misago is clean, with lots of space to read and write. It offers pagination, and this is important to me. I am also tempted towards NodeBB, but they have no private messaging system, and this is a huge drawback.
One basic feature that is missing from Misago is a link within quotations, which takes you back to the original post being quoted. Long-form interaction would require this feature. Are there any plans for such a feature within Misago?