I agree with this. It seems pretty clear to me that SpaceX's key innovation is one of management -- namely rocket engineering using software-like iterative meth

I agree with this. It seems pretty clear to me that SpaceX's key innovation is one of management -- namely rocket engineering using software-like iterative methods. The driving force of course is Musk, who comes from software but moved into hardware where we see the exact same iterative development at Tesla. This is old stuff. They called it "skunkwork".