Even better was for a while in NZ we had an app for scanning your groceries on your phone then you just scan a qr code on your phone at the checkout and pay. Not quite as amazing as the amazon “ai” (anonymous Indian) powered one, but still pretty great and didn’t require a team of actual humans to manually run it(apart from the customer). Too bad they had to cancel it for theft prevention shortly after they jacked up the prices of everything by about 250% in what seemed like one week…