Not sure how widespread it is, but here (italy) we have little barcode scanners where you just scan each item you're buying and put it in the cart. At checkout

Not sure how widespread it is, but here (italy) we have little barcode scanners where you just scan each item you're buying and put it in the cart. At checkout you scan a qr code, gives you a total, pay with contactless card and you're done. It's a pleasure to use. And you also have a display with the updated list and subtotal of everything you're buying.