I think it was interesting his comment about how he really isn't working like a CEO: "Yeah. I think a lot of people think I'm kind of a business person or something, which is fine. Business is fine. But really it's like at SpaceX, Gwynne Shotwell is Chief Operating Officer. She manages legal, finance, sales, and general business activity. And then my time is almost entirely with the engineering team, working on improving the Falcon 9 and our Dragon spacecraft and developing the Mars Colonial architecture."
This seems very similar to Steve Jobs who said he became CEO so that nobody could tell him what he could or couldn't work on. But like Elon Musk he seemed most interested in creating things and not really running the business.
I think this is a clue to successful business. If you got leaders like that you retain focus on good products rather than getting caught up in optimizing financials without a strong focus on actually building quality stuff people want or need.