I’ve got multiple monitors, man. One gets the thing I’m working on or the game I’m playing and the others get other windows and things I don’t need to focus on. Things like explorer or whatever never get maximized, but if I’m using Office or Photoshop or Maya or whatever, I want to focus on that.
If I had ten small windows open on my main monitor, I’d lose my mind. Too much clutter.
Also I meant to add that I use hotkeys for just about everything they hide in those upper menus anyway.