People get hung up on this stuff. Getting things done in different environments is about understanding the constraints. The objective isn't to religiously follow some "ship" cult. The objective is to get things done. Or at least that's my cult. I have a friend in Amazon's logistics department. One day he told me how he was planning something that involved buying up the entire capacity of a local airfield. The thing with a long enough lever and a fulcrum is that these guys are moving the world.