I have to think more about this ... does it demonstrate
2) the ignorance of the music-listening public?
3) that humans as listeners are easily satisfied with this simple chord progression?
4) that there is something innately beautiful and logical in its make-up (perhaps due to the overtone series), analogous to the golden section, which is why we are so attracted to it?
I need more than 30 seconds to think about this, but that may come at a later time, since I have to run off and play the pianer for $$$ right now.