The points you listed make sense to me in regards to manufacturing powertrains - but what they'll get caught up with (in my mind) are things like safety structu

The points you listed make sense to me in regards to manufacturing powertrains - but what they'll get caught up with (in my mind) are things like safety structure development/ crash testing, suspension development, brake technology, large-scale metal forming, etc etc. I don't know if their current injection moulded plastic vacuum bodies will scale up to car-sized manufacturing. They may of course have all these sorts of avenues covered already, and I might just be thinking too hard.