Every evolutionary process started with only a few blocs to build from, frequently resulting in rather primitive designs. But with every cross-pollination more pieces were created, and with every piece more complexity was added to the overall system, finally sophisticated constructions and creations emerged.
Since the OS system is conceived as an evolutionary model, it doesn’t consider its designs to be static end results, but rather sees them as updates of existing versions, phases within a broader cycle. Apart from that, the OS model wants to introduce variety within man-made modularity, welcoming different signatures to the design of its individual parts.