Humans read best when a line is around 10 words long. Longer, and it's easy to lose which line you're on when you go to the next one. The sidebar collapses if y

Humans read best when a line is around 10 words long. Longer, and it's easy to lose which line you're on when you go to the next one. The sidebar collapses if you resize to a narrower window, so I wouldn't call it wasted.