Musk doesn't innovate per-se, he just dusts off old DARPA projects and convinced young engineers to work on them. Autonomous cars, reusable rockets, neuralink, Strategic Defense Initiative... Musks genius is making it seem like these are not long-studied military tech objectives but for humanity. The SDI stuff is very DoD centered-- Starlink as a business doesn't compute without military.

This clicked when I saw an employee review at SpaceX https://www.glassdoor.com/Reviews/Employee-Review-SpaceX-RVW...