Unified, Undraggable
So in Xcode they use this grey area at the bottom of each window, and for me it really reminds me of the Safari status bar, so much so that I constantly try to drag the window by clicking in its area. But then, after it doesn’t work, I remember it’s not a metal window.
It’s the grey that fools me I think.
I’ve done this, too. Other reinforcement: the Finder status bar is draggable only when it’s at the bottom of the window.