This so much. Rather than "don't exceed 80 characters" the guidelines say "break up complex statements into multiple lines if it contains complex logic" and say that the target should be 80 - 120 chars per line.

Just for comparison, I'm reading your comment at 140 characters width and I don't have much problem with that. I like my web text to occupy most of my screen. Only if I stretch it across multiple monitors to 160+ chars per line does reading become a chore.

But it is a personal taste.