Most of the EV's have heating pumps nowadays, assuming that one will work without issues for the entire lifespan of the car. Best case scenario will be like leaving a gas/diesel car idling 24x7 in terms of energy/fuel consumption. I.e not very cheap, and a huge waste of energy.

I'll keep my old gas car, it'll cold start just fine down to -20C.

Yeah, in my country it is cold as it hasn't been in years. My colleagues with their Teslas are awfully quiet right now. I know they have to make a choice, either freeze while driving, or reduce the milage substantially by turning on the heater.

I think (a little) about these people, when I board my gasoline driven car, and turn on the heat at max, while also enjoying the heaters in the seats and the steering wheel.