It does not appear that it would wear too thin. I just looked at it and it does not appear to be rubbing it just slightly now.
Well I wore out two shells on my D1 - eventually the tabs wore off of the face of the shell and it just falls off.
I am so irritated by it because i figured a new phone would have a better designed shell/ holster and its not really.
Just the same thing with a useless kickstand on the back of it.