Where is this information coming from that the bbl is more likely to slip than the axis lock? this is the second thread in which i have seen a post where someone starts with something along the lines of i think the ball bearing lock is more likely to slip because it is round. I have a theory that this is how bladeforums "truths" get started... a couple of people post what seems right to them, and next thing you know, this is quoted as fact. I personally think that Spyderco, a company that places so much stock in lock strength and reliability that they have a machine dedicated to breaking locks, has thought of this potential shortcoming. You realize that much of the price built into these knives comes to pay the engineers that sit around a big table and figure out these problems more scientifically than a 2 line thought experiment on a forum right?
I think its great to sit around and discuss the merits of both locks, they both work in slightly different ways, and to us knife geeks, that is a fascinating topic of discussion. Be that as it may, there is no reason to invent reasons to make it more interesting. Coming to the fight with imaginary facts is like going to war with an imaginary gun.