BNEA320, While you may be correct in that business types want to move away from larger airports. They also don't want to stand in the cold and wet and park their cars on the street miles away, as would be the case if they did away with terminals and carparks per your suggestion
Secondly, Texas has a population of 27+ million, California 38+ million. SurfAir operates PC-12's and Kiwi Regional Airlines is not a subscription airline so i'm not entirely sure that last example is relevant?