The Audi etron has lots of double pain glass and the doors are crazy heavy with insulation. In addition it has an automatic slide to cover the top glass. It’s mostly to cut down on noise and it is really plush and silent. It probably helps with insulation too. They also have a very good heat pump with electric back up.
The etron list almost no range hit at colder temperatures.
Unfortunately all that weight takes a toll on efficiency. It’s just not very efficient to start with. It just doesn’t get worse with temperature.
Look around and buy what you want and can afford. I’m in ohio and an ev saved me a significant amount of money. I had a city car and loved it, bmw i3. I now have a bigger less efficient ev, etron,and it will save me less money over my last ev, but still much less than an equivalent ice.
My insurance costs are similar to ice, but I do pay the extra registration fee. It’s probably a larger fee than the equivalent gas taxes.
In California it sounds like EVs are not as obvious of a choice as electricity can be expensive. If you don’t have a place to charge and you drive a lot, the a hybrid or phev can save almost as much as an ev.