I have done that a few times.

The Aldi by me went self checkout. They lost enough business because of it they brought back cashiers. I definitely stopped going because of how clunky it was. The couple times I went I used the single cashier that had a line instead of self checkout which did not.

“Oh sorry the computer says” is a fucking cop out.

Yeah, fuck that shit. I don’t need a light to come on every time a car is next to me, I can see them with my eyes. Yes I departed the lane, shut up.