Obviously it's not trivial, since they already flew a few spaceships and rockets, but it could be an edge case not considered until now which can still be fixed, rather than a "well, it turned out to be impossible to fly a rocket with this design".
Obviously it's not trivial, since they already flew a few spaceships and rockets, but it could be an edge case not considered until now which can still be fixed, rather than a "well, it turned out to be impossible to fly a rocket with this design".