I just traded a car I bought new in 2008. I never replaced anything on that car except tires and a battery, not a fuse, a hose, not a wire not anything, not even freon in the AC.
I used to be in the auto parts business and hoses belts and freon were big sellers every summer, along of course with the standard tune up items points plugs distributer caps and spark plug wires. Parts stores would starve if they depended on those items today.
As complicated as the new stuff is and old stuff not being as plentiful, I’m amazed at times how these parts stores make it.
Other than some lines for hoses and routine misc. items, I rarely buy anything.
My stuff has to come from online places like Amazon, Kaiser-Willys, LMC, and the like.