Montanero gives a perfect description of a situation where a "sharpened, indestructible pry bar" knife makes perfect sense, primarily because one can only carry so much. But as I follow this thread, I feel more and more that having an assortment of pry bars and levers conveniently at hand makes good sense.

You can get anything from a key ring type "widget" to a hefty iron rod six feet long at your local big box hardware store. They can be destroyed, if that is possible, with no regrets and they can easily be improvised. I find I am carrying my light pry bar more and more, although for a fairly specialized task, but I can see it being useful in many situations, including SD if it came to that.

A pry bar makes a good supplement to a generalized, reasonably good quality (Mora) knife for a lot of situations.