Elon Musk on Starship at X Takeover: • Starship is one of the hardest engineering challenges ever attempted — three times the thrust of Saturn V and fully reusable • Starship is late, but not impossible • The biggest current hurdle is developing a fully reusable orbital heat shield — something no one has done before • The long-term goal is to make Starship cheaper per ton than even an expendable Falcon 1 • Next major milestone: orbital refilling — transferring mostly liquid oxygen between Starships in space • No one else is seriously attempting this level of reusability or innovation in rocketry