Oddly, I kind of like grocery shopping, but that’s partly because I’m lucky enough to live where the stores are big enough and have enough variety to cover my wants and needs, but where the population is low enough and mostly laid-back enough that the experience never really gets hectic. I tend to shop daily, or nearly so, buying small quantities of stuff except for occasional Costco runs for things like paper products or the few bulk purchases we can reasonably expect to consume.
Growing up, it was a very different experience. We shopped once every two weeks maybe? Usually at the commissary on the Army base we were either stationed at/near or, after my father retired from the Army, the base we simply lived near. Those were horrendous expeditions of doom, indeed. Later on, living in the DC area, shopping was a lot more crowded and hectic, so I tended to go as little as possible.
But today, hardly anyone in the store uses a checkbook, the lines are generally short, there’s usually self-checkouts (that admittedly suck compared to other systems), and I like browsing sometimes. We do get a fair amount of non-perishables from Amazon though.
I like the idea of the hand scanner, but I fear in the USA no one would do that because they’d be terrified the scanners would all walk out with customers, on purpose or otherwise.