My five cents because the basic design philosophies are quite different. And also industry inherent arrogance, especially within the so called premium manufacturers.
Bit the the opposite is true as well isn't it? You cannot treat automotive manufacturing like software development. I'd say the first company to successfully blend the two has a huge advantage.
Not so sure about Tesla having figures out automotive mass production. Cannot comment on the software side of things, but I donhave the impression that Tesla is ahead of more traditional car makers there.