Why does a bear crap in the woods?
I like blued guns, always have but they're not so popular anymore so Duracoat or Parakoat or krylon or whatever the flavor of the day makes a worn gun look new again. Some folks go a little overboard, it's human nature.
Most mortal folks, ie.....everone on the forum but you and kilopaparomeo can only afford a few guns in the locker. What did you spend last year on guns Bill, 10 large?
While I can afford more today than I could ten years ago, if I had an extra 10 grand to spend, it would probably be for a decent vacation not another AR so a can of Duracoat makes sense......OK, I'd buy that lever gun I want too! (and about 9400 bucks worth of ammo!)

.02....