In North Italy almost all groceries stores offer

Self checkout: where you do your groceries and at the end you scan the item one by one

Advanced self checkout (you are registered to the store): you get a PDA and you scan and bag all the groceries while you roam the store. Then you scan a qr, you get the total, pay and go. No Id checks for alcol or anything (sometimes you get a random partial re-reading where you get an sales person coming and scanning 3 items at random from your bag to check if you scanned them, or a total re-read)

Normal slow cashier point

Advanced self checkout is something I would never give back. Even if I buy a lot of things, the quick payment process is so quick that nothing compares.

I can enter and leave a store in under 10 minutes buying a lot of stuff (note that I go there walking multiple time per week)