The problem is when I think I'm reading something new then realize half way through "Wait, didn't I read this two days ago?" It's a huge waste of time because

The problem is when I think I'm reading something new then realize half way through "Wait, didn't I read this two days ago?" It's a huge waste of time because it's the comment from two days ago with a tiny new header added making it relevant to this topic instead. Comment reposts should (must?) designate such at the top with a link back to the original comment.