Theranos promised a faster, cheaper way of doing something.
Tesla built a very expensive sports-car, before they advanced towards cheaper products for the masses.
Tesla built a very expensive sports-car, before they advanced towards cheaper products for the masses.
Disclaimer: I don't know much about how SpaceX or NASA's finances work. But I assumed that, due to their tighter coupling with a government, NASA has less leeway in their decisions of which technologies to research compared to SpaceX.