I'm not understanding what the kerfuffle is all about.

One is not better than the other.

In both cases, any scope adjustment is going to require calculation.

I use a MOA scope, range in meters, and use meters in my ballistic calculator. I don't need to do math in my head, so the units of measure are just numbers to the calculator.

Ranging in yards and using a MOA reticle makes it easier to mentally quantify an offset, and the same for ranging in meters and using a MIL reticle. In cases where the target size is given in cm, but not the range, it makes the mental gymnastics less challenging when using a MIL reticle. Same for inch size targets and a MOA reticle.

Interestingly, scope bases are never classified in MILS of elevation, always in MOA.