I have multiple appliances designed to increase or decrease the heat in their interiors, and for some reason they aren't connected. I have a water heater that has nothing to do with my refrigerator, even though pumping heat out of one and into the other would be quite efficient, to say nothing of overall household HVAC.
What I don't need is to have any of this managed by a vendor's server somewhere out on the internet. That seems to be the main reason to sell products today, so.