This has a lot to do with culture. Microsoft had a mockup of an e-reader before the Kindle, but the powers that be in the company insisted that it should run Windows (not out of malice, but because that's how they saw the world.) When Bezos, who, at the time, ran a giant bookstore, started his Kindle project, he put them on a secret team in a different building.

Car companies are run by people who love engines that burn gas. The notion that electric vehicles might be something more than compliance nightmares, that they might actually be better cars than gas-powered vehicles is foreign. It's like the Microsoft execs saying "of course the e-reader should also be able to open spreadsheets and what-not." Meanwhile, the Kindle is better as an e-reader because they started from the ground up.

Same thing with Tesla. (With whom, none of these companies would be talking about going electric.) They started from the ground up.

If BMW wanted to make money on electric vehicles, Tesla has proven that you can sell an $80-$100K+ electric car (with a ~$50K interior) with profitable unit economics. I'm pretty sure an electric 7-series would sell like hotcakes, and make money. Instead, you get the i3, which some people love, but it's certainly an acquired taste, and the 3 series e, which I drove recently-- it has about 11 miles of electric range. ;( If they just made it all electric, I'd buy one tomorrow at the already high 3-series prices. But the culture isn't there yet...