The difference is the feedback is pretty incontrovertible if you build a building and it falls down. If you use composition instead of inheritance, the evidence

The difference is the feedback is pretty incontrovertible if you build a building and it falls down. If you use composition instead of inheritance, the evidence of whether you're right or wrong comes in the form of ... slightly faster refactoring two years later? Maybe? All of the stuff engineers argue about and that seem really subjective are the things where you just get very little feedback about who is right or wrong.