Do they need to? Should Falcon Heavy work as advertised they can get 50+ tons to LEO. Considering the Heavy is using a lot of F9 tooling and production lines (~same boosters and such) it probably saves plenty money not producing drastically different types of launch vehicles.<p>It seems as if for now Musk is betting on F9 + FH to milk the satellite industry for cash to fund his mars mission which requires a completely different vehicle setup including a new engine (Raptor) among other things.