The issue with those very high alloy content steels is that having thin edge, at least reasonably thin to be on a knife becomes a problem. ~30-40 inclusive edge can be too weak enough for some of those steels, maxamet included.
CPM 10V and similar alloys can't really perform to their max potential when the edge is ground too thin, 10-20 inclusive edge is not good enough to support high carbide edge.
Maxamet might have the same issue.
The thing with industrial cutting tools is that they are not shaped like knives at all. 90deg angles are common and they(industrial cutting tools) are part of the machine, not subject to unpredictable loads and use as knives are in human hands...
I have Farid's mule in REX 121, which is around 68-70HRC, and it is a bear to grind or even sharpen. I've killed 2 silicon belts on the grinder, trying to thin down the edge. 120 grit diamond stones are a bit better, but still time consuming process. Holds edge very well though
P.S. Neither ZDP-189, nor Cowry-X will do well with edges below 30deg inclusive, and both can reach 68HRC, if you find a maker willing to do that, most of the time I see custom ZDP-189 around 64-67HRC, I've seen one run of the kitchen knives at 68HRC, maker later dropped to 67HRC, too difficult to sharpen.
