At my supermarket the self checkout line is usually mostly young to very young shoppers with just a few items. When you watch them check out they have adapted t

At my supermarket the self checkout line is usually mostly young to very young shoppers with just a few items. When you watch them check out they have adapted to the idiosyncrasies of the particular machine and navigate it with few hiccups. I still prefer the in-person checkout most of the time but have also learned to avoid the usual pitfalls of the robot. Also, sometimes I'll arrive with a pocketful of change and feed that into the self-checkout, even though it takes a long time. I don't want to burden a checker with that.