I have to call user error on being unable to sharpen AUS8.
I don't claim to be a master sharpener, but it was easy to put a razor sharp edge on the few AUS8 knives I've sharpened, including my RAT1 and my 4 inch Talwar.
People have criticized the edge holding of AUS8, but the edge taking?
AUS8 is very easy to sharpen-that's the biggest thing it has going for it, actually.