@Ourorboros Dr. Kraichuk's report agrees that the X50/4116 edge holding is poor. It seems however that even with this steel a more acute edge angle may be advantageous. It has been known that a more acute edge has a longer wear life, but community wisdom has been that mainstream German steel does not have sufficient rolling resistance to make use of acute angles. The report provides evidence that this wisdom might be wrong. (I presume the edge rolls but still performs due to superior geometry?) I'll certainly be experimenting with lower angles on this class of knives.