Self checkouts that just let you scan items without issue and accept payment are a nice enough idea for a bag or less of shopping, my problem with them is how they are implemented in reality (in Australia anyway). The first implementations I encountered I considered an useful addition but both the machines and the staffing changes due to them have steadily gone downhill in terms of user experience.

Instead of a quick painless experience you get a horribly touchy weight sensor which can't reliably handle particularly small items, particularly large items, or non-standard bags (and there are no longer standard bags due to plastic bag bans), a machine which demands assistant intervention at the slightest issue (and the assistants are understaffed so never arrive quickly), and when you finally get to payment it makes you click through an annoyingly slow interface to tell it you don't have a rewards card and don't care to donate to some charity before it will activate the card reader. To make things worse the manned checkouts are never staffed at a level - if any are even open - to cater for people with full trolleys so these end up clogging up the self checkouts (which have tiny bagging areas and are not intended to handle a trolley load) and making everything slower.

The icing on the cake is the self checkout treating you like a thief and throwing errors if the camera system thinks you didn't scan something in the trolley or letting off an alarm like you're trying to make off with something when you just want to buy a can of paint.

I'm European too, living in Russia and I've never seen self-checkout that accepts cash. Despite seeing many vending machines that accept only cash.

I'm from France living in Sweden and I've seen people not wanting to use self-checkout because it's used to cut cashier jobs. Where you'd get 4 cashiers, you just get one person watching the self checkout. I'm personally ambivalent about because I do find it faster and convenient, but it is indeed a loss of jobs

I recently moved, and my now nearest store does not have self checkout. It's horrible. I spend more time waiting in the line than actually finding my items in the store. During the three years i used my previous local store, I only had to wait for an unoccupied self checkout maybe two times.

Depends on the SCO system. If I can swipe the item, swipe the card, and walk, then yeah, great. But if it can't handle small items, can't handle packages, and in particular makes you scan the receipt, no thanks. You cut an employee, eat the shrinkage and leave me alone.