I think the difference is in what is trying to be produced. Musk has said that his goal is to build a rocket factory, i.e. SpaceX is trying to produce lots of rockets, not a few rockets.

In software that might look like a company where they have lots of teams experiment with lots of software and project management approaches across a wide variety of project types. This second order concern contrasts rather heavily with the first order concern of making and supporting software products.

>> Yes, planning ahead is good, but it is not end all, be all

Actually it is when faced with being exposed to a vacuum at −455 °F.