I went through about 300 zip ties when changing logos on the downtown trashcans. During this, I slipped dozens of times, smacking the metal, hitting the tip, even once grazed the concrete very lightly with the edge. At the end of the day, I thoroughly examined the edge, not only did it hold a fine polish, I took it to my hair with the absolute tip of the cutting edge, and hair was still popping off my arm. I thought the hits the the metal logos, and trashcan cages would have really punished the blade near the tip. I was wrong.
(xm 18 3.5 spanto) it has seen one full sharpening session, and been stropped ever since. Really all my S35vn knives I have only sharpened 1 full session, and maintained with leather.
D2 takes a razor edge very easily, but don't use it to cut much.
3v has treated me well. My 2 dcl sheepsfoot knives may be the sharpest I own. The one with the right hand grind is just nasty. I haven't shaved with a typical razor in months, because I can just touch up my face at work with the sheepsfoot. The grinds have a lot to do with those.
My w2 custom fixed don't see much use, but sure take an edge well.