I would say alot depends what kind of rifle or handgun discipline you're into. If you're using the rifle say for casual target shooting, hunting, plinking ect. using a boresnake/nylon/brass brush would be OK. I've watched the Marine Gunnery Sgt. 9 times National Champion use a bore snake on the line, even uses it now that he's no longer active duty, so it must be OK.
Now if you have a custom action, custom barreled, custom stocked, thousand dollar plus benchrest rig, I doubt very much a bore snake is the way to go. Highly polished hardned steel rods ie; made by Ivy Rods, with a bronze brush or nylon brush is more likely what you'd see being used.
Myself for casual shooting I like the patch worm and have never had any problems, but its always in the back of my mind, "what if the dern thing breaks", never has, but I always wonder. Sorta like if you operate a dangerous piece of equipment, you wonder is today the day it bites back. The old saying, if you walk thru the pasture long enough, sooner or later you'll step--------
BTW that thousand dollar phrase is used VERY loosely.