The Southwest thing could be, some cartridges have regional popularity, like the 338 in AK for example. I guess I wonder why people get bowed up over this stuff. I look at the merits of the cartridge & what performance it offers for me. I don't give a flying flip if it is popular all over the country or especially across the pond, who cares.
As far as the round is concerned, it & the big 25's in general are second to none for an Antelope round & great for Deer in general. The ballistics are what they are, if you don't need it, don't buy it, & silly to let it bother you if others like the round.
I agree with GB on the cost of the brass in particular. That cost tends to disappear when you start buying tags, gas, motels, etc., pretty much irrelevant.
The gun writers are promoters, heavy into marketing, is someone surprised about that?