What do you mean "just" a cost saving measure? It's 3% the cost. So they can build 30 rockets for the price of one. Pretty important detail, when your goal is t

What do you mean "just" a cost saving measure? It's 3% the cost. So they can build 30 rockets for the price of one. Pretty important detail, when your goal is to reduce launch cost be two orders of magnitude. And no, F9 won't change.