Re: OS X
The Mach kernel is poor compared with Linux from a performance point of view - There are NO OSX computers in the TOP500 super computer list :)
You are correct in saying that Mac experience is not copied from Linux. However saying "The Mac Experience, which predates Linux by 17 years" is a little off the mark. Linux is Unix like (clone is a bit strong) and Unix predates the Mac experience by 13 years! Also, it is very old news that Mac was based on the Xerox PARC developed Alto personal computer from 1973, that Bill Gates also referenced for Windows.
Apple tax is a thing and that is NO FUD - you make a nonsensical comparison with a $300 Pc Laptop - show me any Apple Mac for that price. I have built more capable machines than Apple sell for half the price!