Hardly surprising that a rare form of payment isn't terribly fast. When you have cashiers who work with actual cash all day, and customers who know the process

Hardly surprising that a rare form of payment isn't terribly fast. When you have cashiers who work with actual cash all day, and customers who know the process of taking a quick inventory of their change reservoir while their goods are being scanned so that they can very quickly decide between giving precise change (in addition to the uprounded sum in paper) or not once the final sum is known. Mirror picture in Germany, many people are still wasting time engaging in some kind of mini-negotiation with the cashier before paying in plastic (usually a debit card, which is quickly taking over most cash transactions that happen at a register). Also, American banknotes with their identical size and color over all denominations are just incredibly impractical for anything but building those nice tidy stacks of drug money depicted in the movies. Cash payments in the United States are a terrible benchmark.