I'm far from a Tesla fan myself, but one thing I found really cool are claims by friends who worked with Tesla is that they have a huge lead on mainstream car makers thanks to the fact they design and make a huge part of the cars and "stack" in-house. Rather than 80% of the car (and code) being built by 1st tier makers, packaged by 2nd tier and integrated by your 3rd tier provider, leading to very very slow iteration cycles. One friend even claimed they do continuous delivery on many parts of the hardware on a daily basis (meaning revisions are a frequent thing across the entire stack). I am not sure how much of this is true though.