Standard velocity medium bores never got much traction, despite the protests of their fans that everyone else was sadly misinformed and out of touch with their view of reality. Fans tend to be convinced that since its bigger, its got to be better. This is as much a belief based on intuition as anything else, but people's beliefs are real enough to them. They usually and correctly point out the due to terrain most shots tend to be rather short and at such ranges trajectory is sort of academic. They also feel that there is an advantage on larger game, whether or not said game is actually hunted. They also seem to spend a lot of time thinking about bears.
Small bore users (lets say from 6.5 to 7.5mm for the sake of argument) acknowledge grudgingly that bigger is better than smaller, but usually in the same sentence where they declare their belief that faster is better than slower. They will support this belief by pointing out that the majority of people must agree with them because the market has clearly spoken a long time ago. If range is mentioned they point out that while many shots are close, that's a far cry from all of the shots being close. They will correctly point out that "small-bores" will be in the game at ranges that would have the standard mid-bore guys aren't likely to even dream of. Regarding game size they point out that while bigger game certainly exists 90% of the game in the world isn't one bit bigger than a big Canadian whitetail buck or muledeer. That makes the default average shot not very long at a animal that isn't very big. They correctly observe that they don't seem to struggle to kill these unlucky animals. Regarding bigger animals it will be noted that moose are big pussies, and that elk are both not pussies and have an excellent chance of being a long ways away. Bison? Uh, how many people are actually going to shoot one outside of a farm setting? Grizzlies? There aren't enough to go around, so most people won't get one. Blacks? Well, most black bears aren't particularly big and they aren't hard to kill.
Maybe, it can be boiled down to some people believing that the mid bores might have an advantage in some situations where it really doesn't matter and might have an advantage in other situations that probably aren't going to happen. Some won't even give throw them that meager bone. That isn't much to base a successful marketing stategy on. The .350 Rem, .358 Win and my .35 Whelen are deader than dirt as far as market success. Outside of Africa nobody but enthusiastic hobbiests even know what a 9.3x62 is. Battle is over, guess who lost? The medium that truly succeeded is the one that crowds up against the big guns. The .375.
Its best to keep the two camps apart when whisky is present.