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I actually like them, for the usual reasons about changing the angle and pulling material into the edge.
I dont usually go for extreme ones, but a slight recurve like on my new Buck 722 is very utilitarian.
As for sharpening, the edge of my Sharpmaker's rod, and then stropping seems to work fine for me. I just stopped the 722 earlier tonight because it got some heavy use earlier today. Every single part of the edge will pop hairs with ease.
The strop conforms to the curve, so in my experience, a recurve is no big deal to keep sharp with stropping.View attachment 780446
One only has to look at some of the Mick Strider Custom stuff to see that the high dollar multi-grind stuff was never intended to be used, let alone sharpened.
Is that recent? Slick AF.
There's not really any inward slope to that edge--at least none discernible in the photo. It looks like the heel of the blade just juts out suddenly, which is rarely going to be useful.