You reach the end of a thread, you look down to see the headings Talk, Chat, AIBU, and there's nothing there. YOu have to scroll all the way up and then click talk and scroll down and find the right subsection, which you need to know where it is (eg Fun and Games for chat)
this is on the desktop
as it is, it's far less easy to hop around and you have to make more effort, which is offputting when you're jsut idly browsing