Actually, no, you still have to perform the "find the window" function and the "bring the window to the top" function, for both maximized as well as non-maximized windows. And once any given window is sized, the 'management hassle' for 'find and raise' is identical between both modes (maximized and non-maximized.
The screenshot you posted is of a Mac, so because of that I am going to assume you are using a Mac (because otherwise you would have posted a screen shot of some other OS). This explains why you believe that window management is a hassle.
Mac's window management support is on par with MSWindows window management, which is to say, they both suck for handling more than a handful of windows at once, and they both suck for doing much more than "find something - bring it to the top" (and even that function on both is awful as well). Which is really sad given that Apple is the company that brought the whole multiple overlapping windows GUI model into the popular view (Apple Lisa).
Additionally, because you are using a Mac, I am going to assume you are likely using a Mac laptop (simply due to the sheer number of Mac laptops sold vs. Mac desktops, there is a significantly higher probability you are on a Mac laptop). This leads directly to a second reason why you believe window management is a hassle. On almost any touchpad/trackpad, with the current UI hooks used by Mac (and Windows as well), window management is a hassle and sucks terribly. This is because all the UI hooks are designed around a mouse with a separate button (or buttons) that can be independently held down separately from creating mouse motion. On any touchpad/trackpad that lacks separate mouse buttons that can be independently held down with your second hand, performing any kind of "hold mouse button down while moving" operation is made significantly more difficult and a major hassle. This is due to the need to reposition your fingers on the pad to perform large movements, and the act of repositioning loses the "hold button down" mode, so you have to repeat the "hold button down" action just to reposition your fingers. But this is not a flaw with multiple window UI's, this is a flaw with Apple deploying a touchpad without separate buttons and failing to update the UI interface to better mesh with the physical constraints of a single touchpad without external buttons.
I didn't post the original screenshot, you're probably confusing me for the poster of the parent comment.
I am using Windows and I'm writing this from a desktop, from a Linux VM. I don't find window management to be much better when using a mouse. I maximize all my non-instant messenger windows.
Maybe one day I'll use a different window management paradigm, but I doubt it. I already have a special keyboard layout and every time I use a standard keyboard layout I feel/look like a newbie since I need to adapt to the new circumstances. Switching to a different window management paradigm would mean that I would have an even harder time adapting to using another PC.
