I do too much side-by-side stuff for this to really work for me. The loss of multiple desktops is one of the things I really don't like about OSX. I really can't live without 4-8 desktops.
It has multiple desktops in the best implementation I've seen so far. I use four stretched horizontally. You can have more horizontally, vertically or in a grid. You navigate between them with Control-[Arrow Key] or by using the icon on the menu bar. You also aren't likely to get lost amid all your desktops. The current content swipes off and your new desktop content swipes in (direction depends on the direction to the new screen), and an overlay animation at the bottom of the screen whenever you switch shows where in the larger pattern of desktops you're coming from and going to.
I'm not sure what you're talking about, zeugma. OSX still has multiple desktops, both real and virtual. Spaces (multiple virtual screens) and multiple monitors are available on even the lowest end Macs... Easily switched between screens or monitors.
OSX has multiple desktops...called Spaces. I use it all the time.
Ed