Perhaps I'm working of a false narrative, but SpaceX and the methodology it uses (simplify everything and fail fast) seems to be coming directly from Elon.
He's a horrible human being but has had a couple worthy ideas.
I initially believed his early videos about how he applies the scientific process, with a spreadsheet of the BOM, optimising for specific questions and failing early and all that.
Given his later attitude when it came to careful thought, I'm no longer under the impression that these earlier expositions were his ideas at all. I suspect he got it from the engineers and used it to burnish his image. I know that certain companies, e.g
Apple, Dyson, etc have a culture of "all ideas came from the big man at the top, no matter who thought of it."