For me it's wishing i could still focus on the front sight with my bifocal vision, deciding which contact lens works best with a scope, putting another stick-on target on the end of a 3x4 piece of pine and seeing how deep different bullets penetrate, shooting the .223 into the same little dent the .22 made in a cinder block and measuring the hole, then repeating the process with a .308....shooting an occasional target to make sure the .4" group is still in the center of the target, not somewhere else...so meat gets harvested.
Barrel break-in? Nah...cleaning wear? I doubt it, from looking at the barrel and measuring the groups of my 70's vintage guns.
Benchrest competitor? Nope...but i DO get it (honestly, i do...totally). To each his /her own.
For me, minute of squirrel eyeball, woodchuck chest, coyote (nearly anywhere), Deer vitals (a huge 6 inch diameter circle for my self-imposed vital zone), etc, etc, etc....requires nothing but a good rifle (hard to buy a bad one these days) some ammo (hard to find ammo that won't do the above items these days) and plenty of time.
My rifles get cleaned eventually around once a week. Accuracy (lol...i realize my conditions/standards may not appeal to some...but note the "occasional target") is unaffected.
The internet brings world-wide flavor to stuff like this. Anybody can post anything. I'm just glad i grew up in the 60's and 70's before all this stuff mattered so much.