This is why I love self-service machines at supermarkets. No longer do you have to queue for ages at a counter, only to find some daft person has waited until their whole trolley has been scanned before declaring they have some vouchers and then start searching in their bag/purse/wallet for them. Then they wait until the vouchers have been scanned and the total declared before they even think of getting their wallet/purse/coin pouch and and looking for the money. Then after they’ve handed the notes over they say “Hang on a minute! If I give you the odd pennies, you can give me a round pound/fiver/tenner in change!” and they start searching through their shrapnel for the right coins. Then they have to search again because they’ve handed over a European cent, or American dime. Then they don’t have the right change anyway and now want one of their notes back so they can hand over a different amount in coins instead… and all the time there’s me who only wants a sandwich and a drink quietly going apoplectic instead.
Alright, the self-service machines aren’t perfect, and wonky scales can occasionally delay things when staff have to check your items and override the machine, but it’s still so much better and quicker than it used to be.