I'm not sure if you were implying otherwise or not, but: spatial metaphor file managers are not skeuomorphic. Skeuomorphism strictly encompasses non-functional interface elements, such as faux-leather stitching on Apple's old address book application. The spatial metaphor Finder in OS 9 was 100% functional.
The way it remembered all of the details (size, layout, position, display mode) of each window and the way each window had an unbreakable 1 to 1 connection to a folder made it a joy to use. It allowed the user to identify what window belonged to a folder at a glance and to be able to set up a whole workspace arrangement and have it be remembered automatically by the Finder.
The way it remembered all of the details (size, layout, position, display mode) of each window and the way each window had an unbreakable 1 to 1 connection to a folder made it a joy to use. It allowed the user to identify what window belonged to a folder at a glance and to be able to set up a whole workspace arrangement and have it be remembered automatically by the Finder.