When I open a thread that I have read before, I would like to scroll to the first unread message automatically. In a long thread I have to scroll past a lot of messages I saw already.
It’s a better concept to have a single page per thread than having everything paged like on E-U, but a bit slower in practice. EDIT: I just noticed the ‘scroll to first unread’ in the corner after I posted this, but that seems a little strange. Maybe messages should go auto-unread as we scroll past them?