[Mr. Jeeves]

Worse, if you become a “Mac person” you’ll end up virtually computer illiterate and unable to use real PCs in the real world.

You might become "Windows illiterate", but Windows literacy consists largely of memorizing hundreds of hacks and workarounds specific to remediating the endemic flaws of the operating system. A Mac user would have no particular problem switching to a Linux PC. ;)

[antiRepublicrat]

A Mac user would have no particular problem switching to a Linux PC. ;)

I would. I'm totally spoiled now. I've had to dip into a shell once (as aside from going to shell just to play with UNIX), but only because I wanted some esoteric power management settings.