You see, that's why I am talking about, we keep "upgrading" these systems to do exactly the same thing. Do these system perform better than the old ones? Maybe faster, maybe more reliable (which is arguable), but the end purpose is the same. Can you leave LEO with better guidance, control and instrumentation systems? It seems not, as we still cannot do this. Do we have better engines/boosters to leave LEO than compared to say 60s? I'd say NO. These engines may be a bit more efficient, may have a bit more thrust per amount of fuel burned. But can they help us to reach the Moon or Mars faster? NO. We don't even have engines nowadays to go to the Moon and back. What's the point of building the same thing over and over again to perform exactly the same function?
