But I keep coming back to: why do supermarkets need networked freezers anyway? Most supermarkets are open most days, with long hours. Can't any adjustments just be done manually by staff on the rare occasions when that is needed? I've seen some people argue that the major usecase is defrosting. But when you're defrosting, you certainly have lots of people on site engaged in emptying the fridge in question. Surely flipping the thermostat is a rounding error as far as costs go?