Personally, I remember reading about and seeing the local Wal-Mart with bare shelves before the pandemic, though in those days it was mostly presented as a sign that the company was squeezing every last cent out of their workforce by cutting numbers to bare bones and then trying to use automation to cover the gap. Hence the long line of registers that only ever have perhaps 2-3 open at any given hour because they’re bracketed at both ends by self-checkout areas.