And of course, there's this idea everything needs to be done like the house is on fire, but I'm usually fairly happy if I see someone getting a break to look at their phone and doesn't notice immediately that I'm standing waiting or whatever. Or ambles over at a leisurely pace, that's fine, take your time, it's hard running around all day
This. I've asked grocery checkers why they sprint through scanning my things, then relax as I bag them, and learned that they're subject to some dumb system that grades them on how fast they scan. Ask them if they're on the boss's clock, and if not, take a minute to chat and give them a break.
Around where I live (Boston area), there are almost universally baggers. This was something that went away for a bit but, while I will if needed, I almost never bag my own groceries.