Well I actually purchased a set of Miracle Blade's,
the one's advertised on TV that have scalloped edges
- similar but not the same as Spyderco's.

The set plus block was going cheap in a shop
and since I knew Spyderco's keep their edge
- which is why climbers / ropers carry them
- I decided to give them a go.

Well, after a few years, they are still sharp
and still cut well.

So their is suck as thing as a stay sharp knife,
whether this one does is another story.

Would also like to try one.