That is how you think about the software you write. System evolution is only one aspect. Most patterned OO codebases I have come across were *not* engineered fo

That is how you think about the software you write. System evolution is only one aspect. Most patterned OO codebases I have come across were *not* engineered for evolution. Sure there were some classes you could implement or replace, but the complexity was not paid back later. Design principles can be applied to all implementation mechanisms.