How do they make onboarding take twice as long?
Discussion
These things never fit, so people start fumbling around for several minutes and then they need to go further to the back of the plane to find a free spot. And they often have to go in landscape mode and can't be turned on their side either. So one such suitcase takes the overhead bin space of two or three large backpacks.
It's less of a problem in the old 747 planes with plenty overhead space.