I never liked the "folding prybar" idea of a knife. Whether it's small enough to fit on a keychain or the size of a crowbar, a prybar should be made from a tough steel, and will be relatively soft (compared to a knife's steel) to increase toughness. No matter how thick you make a knife tip, it'll still be much harder than necessary for prying, meaning it'll also be much more brittle. Even if a knife is "made" to handle prying, it's still a poor choice, because said knife will also likely be very expensive, whereas a small prybar is only a few bucks.
That said, I fully understand designing or carrying a knife that, if no other option is available, can handle some prying if it's a life and death type situation. But if prying is something you do with any frequency, use a tool meant for prying. Like the countycomm Widgy, or even an Atwood tool (expensive, but still purpose-built, and more suitable than a knife).
I have little sympathy for someone who snaps the tip of their knife doing a prying job that a prybar, flathead screwdriver, or the bottle opener of a SAK would have handled just fine.
