Why did Apple sell a crappy OS for over twenty years

Well, to start with, all the EXPOSE options are about giving the same kind of access and clarity to the user -- and they are a LOT better. Second, hiding windows from other apps, Sidebar, the minimizing feature, moving windows off the edge of the screen, having the menu bar fixed at the top of the screen, the windowshade, tabbed window and Launcher options in pre-OS X versions, etc. Everything that allows multiple windows to be accessed contributes -- and of course, most operating systems have them.

The point isn't really about a SINGLE method -- and it seems to me that the virtual desktops option is far inferior to most of the other methods. It is an addition to an OS that already works well in this respect. It will be interesting to see if games use it. I'd love to see an exploration game that allowed me to address characters in multiple game areas.