Excellent article as always; very good point about finding the best handgun and caliber for the individual. The fact is that many people with a smaller body size and smaller hands, or elderly people perhaps even wtih arthritis or other problems with joints – wrists, elbows, shoulders – will not hit as consistently with a larger caliber, and the higher recoil, than they can with a slightly smaller setup.
Have seen women and kids and odler people, flinch and have trouble holding properly the .45 standard 1911 styles at the range. Yet I have found that people can often handle a 9mm more easily than .45, and the ammo is pretty much universal and easy to find, wherever a person is in the world. Just my thoughts.