Ernie's answer jumped into my brain when I saw the title, he just beat me to it, and was probably better phrased.
I had not heard the phrase before this
thread, and haven't used any of such file managers.
I generally change computer too often to get very interested in customizing them. About all I do is install cygwin on all windows boxes so I can type ls and grep.
I've become a shell guy, as the gui stuff changes too often.
I think a lot of the customization is really closer to religion, be it orthodox, reform or conservative, or even Catholic versus Calvanist. I can't even figure out why Linux folks argue over KDE vs Gnome.