I do it all the time. I'm not the type to "look for reasons" to cut things. I still use scissors when appropriate, or my hands to open certain packages.
Granted the vast majority, if not all will outlive me, but every time I use one I also know I shorten the life of the edge. It'll get closer to needing resharpening, and down the road that will cost more time and money in materials, (stones and what not), so if I don't "need" to use my knife, I don't use it. The result, many a day where they just become pocket jewelry, however it's still always nice to know it's there for when the opportunity presents itself to use, like a gun or fire extinguishers or smoke detector, I'd much rather have one and not need it then need one and not have one available.
That s frugal! And I thought I was tight.
