Sure, that's true. But, if people didn't use those rolling bags (which often only fit sideways instead of with the handle pointing into the aisle) and throw jackets in the overhead, then there would be enough room. I really hate those rolling bags and would love it if more luggage were designed with airline storage specs. in mind. For me, the most perfect carry on bag is the Samsonite Ultralite. In particular, the carry on size from the late 80's. It's not beautiful, but I can fit all the clothes I'll need for a week or more, plus two pairs of shoes. Also, because it looks old and ugly and has no wheels, no one ever tries to steal it. It fits perfectly into overhead bins of large aircraft, without wasting any space. I was fortunate to find another one, though in green instead of black, which is fine. In fact, on the black one, the only issues are the handle and one zipper. Pretty good for 24 years of hard use.