I am sorry, but from my experience, what you are saying to do simply has no effect. I am super good about de-burring my edges and hitting them with a gummy stone almost every time I wax my skis (which is fairly often) and I still end up with edge cracks. Regardless of how thick your edges are or how good you are about hitting them with a gummystone or diamond file occasionally, slamming your cold steel edge into cold steel rail with a 150-200lb rider moving at speed is going to result in cracks.
I would personally love to see a ski with essentially a 'Grind plate" under the length of the binding. Basically just a metal plate that runs edge to edge (and would itself make up both edges). It would probably run fairly slow, so the skis would not be the fastest things out there, but I am betting for those of us who focus almost exclusively on rails it would greatly increase the life of the skis. I dont give a shit that I cant wax that part, I just want my edges to stay intact for more than one season.