What's the average humidity in KS, how often do you handle the blades, how often do you use them to cut anything? In a dry environment, a knife that is never used or handled probably won't lose much sharpness to corrosion regardless of what it's made from.
If one were, for the sake argument, to discuss instead
"a knife that is carried and used on a regular basis", things would be much different.
Hard to find a stainless steel knife around here that sharpens as easily...
It's always interesting to see someone comment that a knife is hard to sharpen as if that's an indictment.
The dulling processes are corrosion, abrasion, deformation (rolling/bending) and breakage/chipping.
A knife that is hard to sharpen, is resistant to abrasion. In other words, when someone states that one knife is harder to sharpen than another they are saying that knife is more resistant to abrasion and also, therefore, more resistant to dulling by abrasion. A knife that is easy to sharpen is easy to sharpen because it abrades easily and, as a consequence, it will also more easily dull by abrasion.