quite honestly I don't care what steel is used as long as it's got a good heat treat on it and is the right steel for the job (I don't want a really brittle steel in a chopper, etc).
I have a preference for 1095, and the other carbon steels because they sharpen easy, stay sharp well, and don't break the bank. They are also strong.
Novelty steel...I don't have any time for those. Kind of like zdp-198. sure, it's cool.....but it's not for me.
Now, if I were collecting it would be different. There is value in limited editions, hard to get, rare, or odd items......
given the unquestioned superiority of certain rare and expensive steels, is there no application, whether professional trade, or field, or agricultural, or even a hobby wherein their usefulness over the more common steels is academic?
Well, again it comes back to "right tool for the right job" combined with "what is the job?"
When you start getting into professional settings, you have to look at the cost/benefit ratio. So let me ask: will a knife 2X (or more) the cost perform better enough so that the cost is acceptable. For instance. If a standard piece of farm equipment has a service life of 10k hours, and a salesman wants to sell me a "better" version, but costs twice as much as what I paid for the standard.....it better have a service life of 20k hours, or do the job faster, etc. It better be 2X better for the application.
In some cases, exotic steels can be worse. For instance the guy with the ZDP-198 junkyard dog that he used to open a can......and cracked the ZDP because it was brittle. While you shouldn't use a knife to open paint cans........I could do that with a knife made out of 1095....and while I am abusing my knife, I wouldn't have cracks like that.
From everything I have learned in life........the WHAT very often determines the HOW. You just have to know how to interpret the signs.