Yup, and I suspect a lot has been done at these big companies that we aren't hearing about because there isn't a product on the road. GM just announced 5 different electric drive units. You don't just throw that together in a year. They've been working on it quietly.
I'm not sure why it is so hard to understand that the economics haven't made much sense until recently, and that's the big reason we haven't seen product from other manufacturers. Why would they throw money away? Tesla has shown it is incredibly hard to make a profit at it. In the past year they have started turning a profit. Big coincidence, now that it is looking to be profitable, the other auto makers are starting to jump in. I don't think they are going to be as far behind Tesla as people seem to think they will be.
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