[millstone]

Funny you say that. I haven't tried Windows 8, but window management is my number one complaint about Linux UIs. Windows steal focus all the time. Try launching Firefox, and switch to Terminal while it launches. Firefox will jump in front. Window resizing is also bad. I can never hit the resize target in the lower right on the first try, and when I resize from the left edge, there's all sorts of ugly tearing. I can't stand the window snapping behavior (why should dragging a window resize it?) and there doesn't seem to be any way to bring all windows to the foreground for an app.

Regarding OS X, you're right to criticize the green button. In OS X Yosemite, the old unpredictable Zoom behavior has been dropped, and instead it toggles full screen.

It's funny how our usage patterns are determined by our OS experience. I don't know any long-term Mac users who used the Zoom button; that seems to be a thing that Windows users do when they try a Mac. On the other hand, I reposition and resize windows frequently, but I rarely see Windows or Linux users do that.