Does OS X even let you turn off an external monitor yet? (Via a control panel setting or other software driven interface?) In Linux and Windows I can use the OS to turn it off. The Mac forces me to unplug the monitor or power it off manually.

Didn't OS X users just get the ability to resize windows by any edge or corner? They only had to wait 10 years for that wonderful feature.

How about being able to properly replace the Dock? You can't, because Apple does not allow non-Apple programs to affect NSScreen visibleFrame.

Maybe you can tell us how much Finder can be controlled versus the file browsers in Windows or say Gnome/KDE? Wait, nope - turns out it's sorely lacking in extendability hooks.

Furthermore - OS X has shitty package management and limits what you can do with your terminal as well because you cannot replace certain packages without breaking your entire system - http://cloudhead.io/2011/04/18/why-osx-doesnt-cut-it/

So, no...OS X is not as maleable as other operating systems.