Economies of scale are a thing to reckon with. Right now in a factory that CNC operator ideally ships the part to the next workstation metres away without needi

Economies of scale are a thing to reckon with. Right now in a factory that CNC operator ideally ships the part to the next workstation metres away without needing extensive packing for safe handling and it arrives in minutes. Or it goes to a shelving stack that buffers the flow of parts within the factory but still requires relatively little protective packaging. Freighting everything between micro-companies works in the other direction: it's more likely to be done for low-volume and/or very specialised parts.