Anyone who thinks that an OS is a finished product, has something to learn. Compare OS X 2000, to OS X 2014, and you'll see differences, major and minor. It's a matter of refinement, not negation of anything.What Microsoft did with Win 8 was a negation of what they did before. The difference is radical. Some love it, and some hate it. Now Microsoft is adjusting it. Android is different with each release. That's the way it works.