Bladite, you said the BK-9 is 'basically' 1/4" ? Either it is, or it is'nt. I don't know what system of measurement YOU use, but it ain't a 1/4". My point about this knife is that, for its' length, it could have been a little thicker. The BK-2 is thicker than the BK-9, or is it only 'basically' thicker? It just seemed to me, and GOD forbid anyone should have an opinion that sounds besmirching of any particular product design, that the 2 was heavier duty than the 9.
the original Camillus BK9 was a full .250 inches thick, featuring the "carbon five" type steel, and had the heat treat of the gods.
the current KaBar model is .188 inches thick, featuring a different steel, and heat treat... the new steel is arguably tougher iir and the heat treat superb, leveraging the best of the steel.
so, .062 inches difference is not a lot of difference in a sharpened prybar, that's a whole 1.5748 mm change in a matertial tough enough to take it.
Ethan pretty much invented the sharpened prybar with the BK2 and the BK4 MachAx some 20 years ago? if feels .062 inches is nothing to get excited about, then i'm not worried. iirc, there has never been a Becker thicker than .025
plenty of other makers have produced thicker knives, sometimes to extremes, but that doesn't make them neccessarily better, or tougher.
as to the BK2 being robust? bravo. i guess Ethan figured it hasn't needed to down for performance reasons. the bk9? still damn tough, or tougher, but now easier to carry, a better slicer, and possibly a more awesome chopper.
Bladite