I've noticed that peoples EDC collections frequently have more than one version of a tool. Often its a couple of Leatherman or several sorts of pen, but most often, people seem to carry multiple knives.
Why add this kind of redundancy? Surely one good knife is enough for an EDC situation? Any duplicate is surely unnecessary weight and pocket space?
I've seen EDC collections with three or more knives and the owner claims "minimalism" and "simplicity" as their carry ethic.