Precisely so. SpaceX has been enormously aggressive in developing reusability. The Falcon 9 v1.1, which has flown to orbit 3 times already, is fundamentally cap

Precisely so. SpaceX has been enormously aggressive in developing reusability. The Falcon 9 v1.1, which has flown to orbit 3 times already, is fundamentally capable of reusability, it just requires addition of landing legs and then flying a reusable flight profile. In software terms it's as though they have deployed reusability but kept it behind a "feature flag" which keeps it turned off for most uses, for now. Once they gain more confidence in actually flying reusable flight profiles using stages that include landing legs then they will eventually work their way to returning to land at the launch site.