I actually don’t think Blue’s process has actually followed their motto though. Building a reusable Saturn V-class rocket as your first orbital vehicle is not “

I actually don’t think Blue’s process has actually followed their motto though. Building a reusable Saturn V-class rocket as your first orbital vehicle is not “step by step”. Step by step is how I’d describe the process for Starship; the first prototypes looked suspiciously like stainless steel grain silos, and their development progress is measured by how much they can do with the thing before it blows up.