[pa_denizen]

You are correct that most EDA platforms have a notion of a library but in the domain of PCB design, those libraries are usually limited to components (symbols/footprints). And there is very little verification that is done upon reuse. That's where we differ: design verification upon reuse with the judicious use of component properties written in the same code as the component itself. And reuse is now just copying text, and not having to worry about tool version compatibility for instance.