The work areas have been taken over by unnecessary short cuts to commands that are seldom used. “Toolbars are useful for giving users immediate access to the most frequently used commands.” [Apple’s user interface guildlines window appearance section]. So if you are making a media player just because you have the actions cut, copy and paste does not mean they should be in the toolbar, but Play, Pause and Next should be. Application do not need to present this much to the users on the default view and in many cases it is redundant.
Thanks to Ben Meyer.