SLS is just Space Shuttle boosters, tanks, and engines in a new configuration. Falcon Heavy is just Falcon 9s in a new configuration. Now that Starship's shel

SLS is just Space Shuttle boosters, tanks, and engines in a new configuration. Falcon Heavy is just Falcon 9s in a new configuration. Now that Starship's shell is assembled, it looks 90% done. Which means there's only 90% hidden work left to do. The devil's always in the details. (BTW I'm a fan of all these rockets—ad astra per redundantiam.)