So, on a rather high end, non adjustable knife they add a degree of smoothness not available with even high priced productions (I'm sure people like Mr. Bose also have other special qualities in their knives). Makes sense. Still, why in production knives? (NO, I am not being deliberetly obtuse, I just don't get it in the general knife world and I consider sebenzas, I missed other production knives using them (PM2=different), as fine as they may be, to be in the "general" knife world) And, by the way, have you priced a corvette vs a camry lately? I've had corvettes and better, so I get what you are saying I just don't think the analogy fits.