I have whatever knives in my EDC on my person, and then I also have a knife that lives in my jacket pocket.
Unless the jacket is at the cleaners, that knife is in that pocket, always. When it gets chilly, and I take that jacket off the rack, I simply know that it's there.
It's a Case Sod Buster Jr. in yellow/CV.
I take it out periodically to inspect it for rust and to make sure it's sharp and that the action hasn't fouled from pocket lint and grit. A few months ago I had taken it into the bathroom to perform a lint removal and oil cycle (the mineral oil lives in there), and was standing over the sink cleaning out the blade slot when the wife came in and engaged me in a discussion of something or other.
The discussion abruptly became something about band-aids as I got distracted by the conversation and inadvertently verified that the edge was, indeed, still sharp.
*Sigh*
Anyway . . .
That knife is permanently assigned to that jacket. When the jacket gets replaced, that knife will go to the new jacket.
So, not instead of, but rather also.