Why do I almost never see pilots using luggage with spinner wheels and have literally never seen hard sided luggage? I assume there is no specific rule against it? Is the extra capacity and expandability of soft luggage the main reason?
My motive for asking is that I have a suitcase that looks exactly like 50% of the bags out there but I think spinner wheels would be easier to maneuver out of the flight station at the end of a flight. Also, I'm tall and I smack my own heels pretty regularly while dragging it through a terminal. Pushing spinner wheels along side me seems like it would be less effort.
As for hard side, I'm just curious on that one as the new Pelican case HC22 looks kind of cool.