What happens every now and then to me is that the person in front watches open mouthed as their shopping gets scanned and piles up in the bagging area, then they pay and fuck around with their purse (honestly idk what they’re doing) then take forever to pack, while the cashier starts scanning my stuff and mixes it into theirs.
I don’t love self-checkout, it can be annoying when something doesn’t scan and I don’t have the ability to manually input the bar code like a normal cashier does. And sometimes there can be errors (“place the item into the bagging area” - when I already did), but I’m overall glad to have the option for self-checkout.