That makes sense. Except the price of specialized automated machinery and procedures must be factored in, PLUS the even bigger question do ice-tempered DE blades give a bottom-line corporate profit payoff in this age of cartridges, canned goo, and unshaven faces? That is a very large question.
I respectfully suggest not one adult male in 500 has heard or cares about ice-tempered DE blades. Any faithful customers surely would be a most tiny niche. I've never heard of ice tempered blades until this week, and for the past 10 years I've spent several hours daily on the shaving blogs, though I admit I've spent little time on the topic of blades. Thanks to all for today's learning experience.
If you purchase a Merkur razor, it usually comes with a tuck of Merkur "ice tempered" blades. If you purchase a Van der Hagen razor at your local pharmacy, it will come with a tuck of VDH "Ice tempered" blades. That is how I learned about them You can also purchase VDH blades at the same stores that sell VDH razors. However, I found the blades to be horrible, even worse than Derby Extra blades for my beard. For a young man just starting to shave, the "ice tempered" blade might be wonderful, but they do not work for my old-man beard.
Furthermore, the Merkur blades are among the most expensive blades you can buy. There are far better blades available at less expensive prices; that is why you seldom see "ice tempered" blades mentioned in the forums.