"When you have 20 or more windows open across nine virtual
desktops, the complexity of window management can become
overwhelming. A number of new tools are now available to facilitate
effective window management.
"When Metacity became the default window manager of the GNOME
desktop environment, I was befuddled. I couldn't understand why
anyone would want to replace something as versatile and flexible as
Sawfish with a virtually featureless window manager that isn't even
extensible by scripting..."