And don't forget the space shuttle which had a lot of possible single-point-of failures during launch and landing (e.g. no way to do a survivable launch abort d

And don't forget the space shuttle which had a lot of possible single-point-of failures during launch and landing (e.g. no way to do a survivable launch abort during the first phase of flight; no way to survivably compensate asymmetric thrust when one booster were to fail; no way to shut down or eject boosters until burned empty; no way to perform ballistic reentry and landing when orbital control thrusters damaged).