Coca cola is a bad example as it does not require refrigeration during transport and does not spoil fast (at all?).
replyChoose your own number, but it has to be large enough that supermarkets decided the CapEx was worth it, and also large enough that once one did it, the rest followed suit.
replyIt's not even significant cost. The main cost is still the hardware, not electronics driving it, and especially not a tiny module that talks with electronics to send/receive commands/metrics
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