I almost wonder if this is one of the key differences related to development speed between SpaceX and their competitors (Blue Origin, etc.) Most big space rockets are built in relatively low unit counts as ordered (unless I'm mistaken), whereas Musk's other large concern focuses on mass-production and solves problems for mass production. Hearing Musk speak about manufacturing challenges in the Everyday Astronaut interview, much of what he was talking about in terms of manufacturing challenge was about lessons learned from Tesla. Seems like focusing on the production problems this way may be a reason he's pulling of launch vehicles at the price points SpaceX is achieving.