Not only that but if I do remember/find the threads I'm interested in, I'll definitely not remember which comments I've read already, so... Wouldn't it be nice

Not only that but if I do remember/find the threads I'm interested in, I'll definitely not remember which comments I've read already, so... Wouldn't it be nice to also have the ability to highlight comments that are new since your last visit? That, or the ability to sort comments in chronological order (like in a forum).