Apollo Was NASA's Biggest Win - But Its Legacy is Holding The Agency Back. The Verge
"Apollo had a purpose. It was a major relay in the Space Race, and it showcased the incredible feats of engineering people can achieve when they bend their wills toward a common, monumental goal. It let people dream, and inspired innovation. But if NASA can't find a new purpose that motivates in the same way as the Cold War did, it's possible that the agency may remain trapped in its current cycle of development for human exploration for some time. The agency is trying to break out of this mold, but the politics of NASA and the space industrial complex that have been developing rocket hardware for decades make it difficult to evolve. And the agency may have the Apollo program to thank."