There are so many features in Mac OS X that Apple has ripped off from Linux Distributions (KDE desktop application implementations are their favorite) and Apple advertises as "new and innovative from Apple" that it isn't even funny.
Hell if KHTML was not under QPL and GPL licenses, Apple would have killed it by making WebKit proprietary (and Google Chrome would not exist as it is today).
It takes just one negative experience to shun someone away. That's a proven statistic. I bought Microsoft Office for Mac 2012 for my parents and we had one hell of a time trying to activate it (extremely bad protection) involving contacting Microsoft to receive a corrected request number to get our product key (the box came with some stupid request code which you entered on their site then got your product key online).
Needless to say, my parents do not want another MS application.