Definitely won’t stop anyone buying though is the saddest part.
If it were monitoring-only, rather than connected to the power, it would probably be fine.
E.g. the -80°C's in our lab are all naturally air gapped: the monitoring system is send-only.
I suppose it could expand, but even still, there’s plenty of non-perishable foods. It would be annoying at worst, but maybe never outright dangerous?
It may be some time before staff notices a unit is heating up. And if customers aren't paying attention and grab something biologically fragile like milk they could get food poisoning that could hospitalize you for days.
They had been able to manage just fine for several decades before internet of shits happened.
Fear not for them though, they'll go whine under the government's noze and get a refund. So much for the liberalism they praise when everything is fine for them.
But the way you find out which kind of scenario is by getting the loss and savings data and comparing it, not wondering what could be true and declaring it be the saddest one.