There's an important part of the Tesla story about what they've gotten wrong. Musk has admitted, and perhaps downplayed, the mistakes made in attempting to overly automate the factory and becoming distracted by the "art" of the Model X.

I would be curious to know more about the impact producing so many of their own parts, to custom specs, has had on Tesla's successes or failures. This is another area where Tesla has diverged from the norms in automotive manufacturing.

Generally, it is unclear to me why Musk has taken Tesla on a course so different from how cars are typically produced and assembled, besides where it really count: electric power.