I know it's super convenient for people. It really is. And my opinion is an unpopular one. But ######, I want to shoot the person who invented the wheels that go on the bottom of a suitcase/carry on.
20 years ago, a person could no fill a suitcase to the point where they can't lift it up, because, well, they wouldn't be able to carry it around. Now, we have 98 pound nincompoops who luck around 150 pounds worth of crap because they just roll it wherever they want. Until, of course, it comes time to try and put in in the overhead bin. Then they look like an idiot alligator wrestling. And for the love of Christ, if you can't pick it up, why are you carrying it on your plane?
IF YOU CAN'T PICK LUGGAGE UP OVER YOUR HEAD, YOU SHOULD NOT BE ALLOWED TO ROLL IT ALL THROUGH CREATION. GOOD CHRIST.