sorry but you get a slightly acerbic response from me on this one
Never felt cold in my seats, and that's only on setting 1; any more and they're too hot for me, and let's face it London is not exactly -20C Norway or Canada territory. Pre-heat them from the app (which your 2006 BMW had of course) over breakfast and they're just fine.
honestly though the forensic analysis that goes into Telsa cars is crazy.
It's like people are fine with their cars until somebody does some test or other, and all of a sudden the car is a garbage peice of junk; even the Model T was better than this ...
There's people turning up with paint depth gauges, gap measuring tools and checklists of every single micro-quibble (did I just invent a rather good new unit there?) they have every read anywhere on the internet.
An awful lot of this has been fostered by the Tesla shorts of course, but continues to the day and just ends up with customers completely unecessarily unhappy with their cars.
By Porsche own admission what Tesla have achieved is "astonishing", and yes there have been problems, and will continue to be problems as Tesla matures and I have been and will continue to be critical of Tesla quality as of all things this could be their undoing. But consider they have ony just installed their first "proper" assembly line puts this into better context I think.
In summary , just enjoy the car for all the stuff it does that nobody else on the planet do today, and don't let these micro-quibbles get to you.