Are most suitcases designed to bear its fully loaded weight just by sucking on one surface?
Suction is great though, and ~75% of bags checked through the US are hardshells, so it's something we're not ready to ignore entirely.
There have been some neat attempts with short conveyor belts as end effector tools [1]! Generally these systems rely on being able to rearchitect a significant amount of the process (building a controllable conveyor belt or rearchitecting part of the bag-room), and we're focused on dropping into existing processes.