Three of the four problems in your list of cash-handling downsides are solved in some places through self-service checkouts where the machine automatically coun

Three of the four problems in your list of cash-handling downsides are solved in some places through self-service checkouts where the machine automatically counts the cash and dispenses change, so a human doesn’t have to. Sometimes there is an actual human at the checkout, but when you wish to pay with cash, you are directed to put the money into a machine placed there, so that the cashier does not have to actually handle cash. In recent months I have seen the latter system (human cashier + cash-handling machine) in a Madrid airport restaurant and a Romanian hypermarket.