I think it should have a removable/detachable screen that can still be on hinge if need be as many people won't even travel with it, and will put the screen on

I think it should have a removable/detachable screen that can still be on hinge if need be as many people won't even travel with it, and will put the screen on a stand - or it could have foldable support legs. The screen and main unit could be purchased independently too. Another idea would be to have a second screen that can hang down from the first one for when it's on a desk stand. As someone said elsewhere - no USB-A needed with USB docks via a single USB-C. Another idea would be to have a hall effect keyboard - they are the best.