The world I live in thinks in inches and feet. I was out calling some coyotes the other day. decided to pull out my 243 ai with nightforce MOAR NXS scope on it. found a rock at 995 yards and took some cracks at it. The rock was approx 4 moa by 4 moa. so its a 40" rock roughly. quick easy and no math in my head. if your spotting for a guy with a pair of binculars in your hand isn't it easy to say 8 inches right? of course it is, are you seriously going to figure out mils by at 850 yards?

just as you said its simply another unit of measurement. I think in inches and feet. use what works for you.

I would also liked to seen a capped windage 3x9, These SFP scopes they have come out with are going to be alot more useful that most think. your going to get a reticle that works great on LOW power.