That makes a large assumption that it's an absolute requirement that a knife stays sharp as long as possible being the main need from a knife. I put a premium on ease of resharpening and steels that are highly wear resistant are often horrible in this regard. Something like soft Victorinox steel may dull more rapidly but it's also incredibly easy to bring back to working sharp, as in done in a matter of seconds on very basic sharpening tools. How long is it taking you to resharpen those 'super steels' and what happens if you find yourself with having to use less than ideal abrasives? People simply do not consider the other side of this equation. That's not even taking into account the cost of the materials being much higher generally.
This knife appears to be made for poking holes in things rather than cutting cardboard so I can't agree that Elmax is the best choice here.
Eezox is definitely food safe when it's dry to the touch. The carrier solvent is the toxin and it all evaporates when it's applied correctly.
As far as the knife staying as sharp as long as possible isn't the case, if it were, I would have chosen a custom is REX121... The reason I chose a factory made K390 is because it has the toughness that I was seeking with a better then average edge retention.
Edge maintenance is easy enough with some stropping every other day on Diamond or CBN loaded strops. A working edge is easily kept through two days, and a quick strop after dinner while watching some TV or while my daughter is going through her routine to get ready for bed is often enough to get it popping hairs off my arm. If it needs more, then it is often nothing that a few passes (on each side) on a Spyderco ultra fine ceramic. In a pinch, due to the toughness, a $20 DMT diafold in coarse/fine will repair all but the worst damage in fairly short order by adding a micro bevel until a quality reprofile can be done.
That being said, the initial reprofile was a pain, but worth it.
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As far as this knife being for poking holes in stuff, I disagree as it being the main point (pardon the pun), but it looks as if it were designed after a boning knife, definitely Not a pig sticker. The blade is only 5" with a thin cutting edge geometry. That is a knife designed for slicing, not so much for poking, especially with the continuous belly.
Due to that, the carbides and the working edge and added stainlessness of Elmax would definitely have been a benefit.
I cut meat for a living, and have used many victorinox knives, both in a professional manner and a knife enthusiast with SAKs. I know what their alloys are like, and while they are acceptable, I definitely find them lacking. AEB-L is better in most regards, as is CPM154, and neither requires much more for sharpening.