You get the features of Linux with the ability to run commercial content creation apps like Flash, Photoshop and Cubase. It's very win-win for someone who does a lot of different kinds of work. And since all the shortcuts use Command, the Control key gives you free Emacs keybindings in every text field.

I was only able to give up on Mac OS X when I decided to give up on Adobe software thanks to Adobe's abysmal customer service. Now that I don't need to be able to run Photoshop, I just use Linux.