I absolutely disagree. The whole reason I'm using Apple products is that their software has always been incrementally refined, never "revolutionised", like Windows 8 or Ubuntu's Unity or whatever. OS X 10.0 and OS X 10.9 look almost the same and so do iOS 1 and iOS 6. If the form factor of my Mac changes, it does not make any app on the system look ancient, and it does not negatively affect usability.