I agree. I shot silhouette back in the 80s-90s and that sport really is an acid test for handgun performance. You are shooting out to 200 meters (accuracy) and needed to knock over a 50+ lb steel ram (power). I started out with my Ruger SB 44 mag which had enough power but not real flat shooting. When the 357 Max came out, it quickly went to the top of the heap in revolver class. A lot of Ruger 357 max revolvers at first but they were overtaken by Dan Wessons when Ruger stopped production.
Later an odd caliber started to make its presence felt and that was the 375 Super Mag. While my 357 max was doing fine, I had to get a 375 SM. That revolver was the perfect balance of flat shooting, power, light recoil, and accuracy. I still have it and would never consider selling it but, on point of this thread, it was never popular no matter how good it was. Because you can make brass from 30-30 Win cases you will always have ammo but I would be shocked if any company started producing 375 SMs no matter how good it is. The drive behind new calibers is hard to pin down and not necessarily based on logic.