@tobifant presumably only of use when at home though? My car will preheat for things like leaving the pub, driving home from swimming, my wife leaving university in the evening, etc.
ICE vehicles generally use their waste engine heat for heating, so you have to wait until the engine has warmed up before you get any useful heat from them. Conversely, my EV has a 6 kW PTC heater that will get the cabin nice and warm within a couple of minutes and certainly deice the windows in 5.