Can we talk about the improvised knife?

Edit: Too easy to get, too multi-functional. Makes early survival much easier than it should be. I think the solution would be to have the rock degrade to ruined in 3-4 uses. That way you might actually consider what you want to use it on before going and getting a new one or seriously consider pocketing that can opener/knife/etc. I never get can openers or knifes/hatchets anymore. All of that is handled by a 1x1 rock which i've never seen degrade to worn. I rarely even see ANY considerable food loss when opening cans with one. It's just op.