Earlier quoted context omitted.
Why the hell do grocery store refrigerators require a web GUI? The most complicated computer in the whole system should maybe be an 8-bit microcontroller. For massive industrial-scale refrigeration and storage, it might also make sense to add, say, a serial port.
Well, for a fleet of refrigerators, it might be nice to have a place to see data from the entire fleet. Power requirements, temperature, failures or failure indicators, etc. A large supermarket would most likely want something like that. With serial ports, they'd have to design a system themselves, including the boxes to attach to the individual serial ports. Of course, for a technically skilled individual, a serial…