I missed that part at the start of the video, but all I can say is "we'll see".
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What they might lose on margin, they'd make up in volume.
But seriously, how killer would be AWD as a standard for the MS going forward compared to so many other luxury/sport cars in this segment? How many BMWs and Mercedes have AWD at the same price points and the performance of the MS? None.
I don't particularly want AWD. The two things I've never really thought the Model S is lacking are power and weight; adding both is meh. I mean, it's cool if they make it available for people that want it, but I'd rather have RWD.