Maxamet is an extreme alloy, for comparison, it is to 10V what S90V is to 420J2. Maxamet is used when HSS like M4 fail because they are too soft or wear too fast - just consider that for a matter of perspective.
In industry it has very strong advantages because it can be used where traditional alloys wear too fast or take too much deformation but ceramic fails by fracture, as an example :
"Roll-Kraft, the world leader in tube and pipe mill rolls, evaluated Maxamet alloy in an abrasive tube forming application at a customer's plant. Normally, the costly tungsten carbide rolls in this application would produce 250,000 to 300,000 ft. of tubing. AISI D2 rolls typically produce about 100,000 ft. before rework is required.
Roll-Kraft's Director of Operations, Dave Jenkins, reported that the roll that had been made from Maxamet alloy was pulled from service after 320,000 ft. of production and found to have only 0.003" wear. Roll-Kraft was able to manufacture the rolls made from Maxamet alloy without difficulty as this alloy was found to be machinable. The tooling was reconditioned and put back in service on the production line."
Ref : http://www.cartech.com/techarticles.aspx?id=1588
As a knife - it would set a limit for hardness (as it is 70+ HRC) and wear resistance . In regards to sharpening, don't be concerned about that, I have ground 121REX (a similar CPM steel) on regular benchstones, there is no need for CBN or diamonds.
I am getting a bunch of knives made from a huge bar of it (almost 1/4" thick just for the lol's) :
