There have been very few reusable delivery systems (1? sorta?). That is too low of a sample size to draw conclusions. SpaceX has shown itself to be much more ef

There have been very few reusable delivery systems (1? sorta?). That is too low of a sample size to draw conclusions. SpaceX has shown itself to be much more efficient than NASA and NASA's usual vendors, who is to say this will not build a better reusable delivery system? After all the last one was designed 40+ years ago by a very bureaucratic/political organization. Not to mention that Space uses Kerosene rather than Hydrogen for materials related reasons. Also, while some comparisons to the shuttle's main engine are warranted, refurb costs of the shuttle's solid boosters will not be comparable as they landed in the ocean rather than on dry land. Ocean water is nasty stuff for hitech equipment.