@Gustodon @libroraptor @anne_twain @georgepenney I think "pack your own groceries" is not the main value. The main value is to pack the groceries once, not twice. It's a huge time waster to unpack the car onto the belt, scan everything, put everything onto a second belt, then into a bag, then back into the cart.
I understand where you are coming from and am generally 100% on the same page as you but this system is just so much better that I hate shopping at a supermarket that doesn't have it.