In a video by @Techconnectify@mas.to, Alec goes into a deep dive into the simplicity of his particular model, its shortcomings and variety of data logging tests in an attempt to fix them.
TL,DW: Very simple, cheap and ingenious design, with one compressor loop between the fridge and freezer in series. However, its temperature sensor is wonky and so the fridge is more affected by how long the compressor operates than the actual temperature itself. There is a signficant temperature differential between the top and bottom, fans on the exterior or interior could help but with the faulty sensor only made matters worse. With the controller replaced with a proper temp control unit the fridge functioned much better.
True that, I think it’s more a case of that I’ve been renting in brand new apartments most recently, and a combimagnetron is the standard for all new construction in cities these days.
Although it’s true that my Oma has them separate. But even then, the microwave is built into the cupboards, it’s not a “loose” appliance on the counter top. That seems to be more of a thing in US/UK from what I see