of course the batteries keep getting better.Have you seen the cost of ebikes that can do 225 miles? And as I pointed out in the cold those batteries drain quickly. And if somehow you could add a heating device inside an enclosed frame the weight of the enclosure, the wind resistance it would have, and the heater itself would drain the battery in no time. All the research in the world won't change that.
no i didnt check the cost. 6500 usd. still way cheaper than the cheapest new car.