I never have.
Then again, I'm one of those simple grunts, that for 28 years used an Army issue segmented steel rod to clean my Army issue weapon. They give out kits with coated cables a lot these days too. I do like these, but you can't hunt rabbits with them like you can a blank, and a section of cleaning rod... lol. I've really only been buying civilian rifles since I retired in '09. Prior to that, I've owned maybe 4 or 5 rifles my entire life. Now I have 9 at the same time. (Yay for me) Can't shoot them all in the same day, and I don't get to the range every week, so it's not like I'm doing it that often.
One thing I've got used to is the easy storage of the segmented rods. I like the little green pouch that you can attach to your gear, throw in your vehicle, your tool box, whatever... If I were to use some fancy one piece aluminium, or brass rod then I'd have to worry about finding a safe spot for this long, skinny, easy to bend thing, and I sure as heck couldn't use it in the field. What if I trip, and plug the barrel in mud, or the extractor breaks, and I need to punch out a fired case...
I do have a number of the modern alternatives... the Bore Snake. I know, I know... a Bore Snake is the Blackhawk Serpa of the gun cleaning world... but they work for me. Scrunch it up, store in a zip-lock, stuff anywhere. Once they get too filthy, and I think there may be a bunch of bad crap embedded in it... it gets replaced. Now, I do have a couple of nice bolt guns now, so I may try getting some bore guides, and one piece rods for them, but in all honesty, no more than they get shot, it's probably not needed.