If you compare what it used to take to ship a package and the kind of selection that a local store might have, it's pretty great.
Also, a lot of that is automated to take a bunch of the drudge work out. Twenty years back, I remember that a guy I worked with at a research lab was working on some of the in-production-back-then automated-sorting-and-aligning-of-boxes-on-conveyor-belt stuff, which was done in a pretty clever way, by just activating and deactivating rollers on a conveyor belt, no robotic hands or anything mechanically-fancy needed.
googles
Not the system in question, but an example of another: