These systems only exist because those economics were decided decades ago. Issues are not exceptions in systems like this. They are huge, complex, and interface with the public.
replyThe systems track all kinds of data and are decent at predicting failures before they get expensive.
Marketing. The restaurant industry doesn't have less skin in the game than grocery retailers re avoiding spoilage and net connected walk-in coolers and freezers are not a thing.
replyFrom my experience in a restaurant, those large commercial rooftop refrigeration/freezer units need attention several times a year. It's rare that your home fridge would have trouble that often but commercial units are more complicated and in a harsher environment. And supermarket installations are probably even more complicated.
replyRoutine service and maintenance doesn't require net connectivity to schedule.
replyNot all issues are routine.
replySo we schedule service, and then we throw away all the food anyway because the problem cannot be addressed remotely.
Agreed. I was just addressing that it's not exceedingly rare to need to get a tech out on site to address something. Should the manager be on top of this, checking temps on all the cases every day? Absolutely, but I can see the argument for a more automated system of monitors/alarms that can get a tech dispatched before the manager has even noticed the problem.
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