I've heard that argument and think it's bogus. None of those short mag .40-.45 cal guns are "competitive" in Production. So no guns will be made obsolete that aren't obsolete already.
i agree with this, in the past 3 years the top 16 i beat you wont find more than 2 that didnt use a 9mm, i think everybody in the top 16 used a 9mm this year at nationals, i would beat that all but 1 in the top 50 used a 9mm, so the capacity think is moot at this point