Hi, I was thinking of how a thread can get derailed by disagreements sparked within the thread, some of which might be relevant but still digress from the original topic. Wikipedia articles contain the "Talk" tab, allowing the debate of the content within the article. Maybe an option where you can sub-comment a specific post, and have an expand/collapse button, etc. Maybe that would concentrate the relevancy in a thread. I would guess new features are a lot of work, but I'm just brainstorming.