I, too, wonder if there isn't some confusion here. 440C is an excellent steel. It won't hold an edge quite like ATS-34, but still better than the 2nd-tier steels (8A, etc.), and it's very tough. Before ATS-34 made it big in the later '80s, 440C was the hot high-end stainless. I absolutely feel it would be foolish to dismiss what otherwise might be an incredibly well-done knife just because the steel is a half-notch behind ATS-34 in edgeholding.
In theory, I feel the Griptilian could replace the endura for my lighter-weight carry knife. I say "in theory" because 1. I haven't held a griptilian yet, and 2. I keep thinking I'll replace my endura with my next knife, and it never seems to happen.
Certainly the lock advantage is a strong one. The endura's lock has always been fine, but I've also been able to bend it out a bit on harder use. An axis lock would be nice. But, the griptilian would also have to match the endura's great carryability (very thin and light), and the ergonomics which work wonderfully for my hand. Not to mention that I find the endura's blade shape to be outstanding for everyday use; I love that sharp point.
I've been wrong too many times to confidently predict that this is the knife that will replace my endura, but the griptilian certainly could be, or at least work its way into the rotation along with the 710 Axis, the endura, and calypso jr.
Joe