I have and carry GEC knives with 1095 blades and Case knives with CV steel blades. It all depends on what you use them for and your environment. If I don't use my carbon steel pocket knives for cutting apples, I never get a patina on them. Which is fine, I don't especially like the looks of a patina.
I just use a little mineral oil and/or Renaissance Wax on them every so often and never have any problems. When not being actively carried, I put a small drop of mineral oil in the pivot and spread any excess on the blades with my fingers before putting them in the knife drawer. When a particular knife goes back into the carry pool, I wipe off any residual oil and it goes in the pocket.
It's really nothing to maintain a carbon steel knife. Just a little care once in a while, and don't put it up wet.
I have stainless steel knives I use for cutting apples. Though if the only knife I have with me is carbon steel and I really want to cut an apple, then I cut the apple. It's easy to polish the blades back to shiny when I feel like it later.