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I wonder how many people working in any given supermarket chain actually know that their fridges are connected to a network at all.

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Not many, probably, but their cold chain people definitely would have known. Instrumented and remote monitored cold chains are standard these days because keeping stuff refridgerated end to end is a pretty big deal.

cold chains were already standard before connected fridges, one doesn't mandate the other. The issue is most of all not remote monitoring but remote management.

I don't know what "cold chain people" are, at the scale of supermarkets you permanently have refridgeration for different groups of consumables.

I'm not aware of a scenario where e.g. fish is being shipped, and the originating logistics remotely sets the temperature of a fridge at the destination.

I bet most managers don't even know you can even connect a fridge to the internet.

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