The point of my post on stopping power isn’t to engage in caliber wars. Nope. I think that the suitability of a handgun caliber for self defense (against human sized opponents) is, like many things, a bell curve. On the left side of the curve, a caliber is unsuitable because it is underpowered, and on the right side of the curve handgun cartridges are so powerful that they are unsuitable because the handguns that fire it are just too large for practical carry.
In the center of the bell curve, the differences between one cartridge and the other are small and not really significant from a self defense standpoint. At that point, the features of the handgun itself overshadow the effectiveness of the cartridge to everyone except the writers of shooting magazines (the publications, not the feeding devices).
For the reasons above, I don’t get into caliber wars. My criteria is this: the left side of the curve for a self defense begins at the .380 level and progresses through .38 Special, 9mm, .40S&W, .357Sig, .44Special, .45ACP, and on to the right side of the curve with .357Magnum, .44Magnum, and 10mm. Mixed in there are the less popular calibers of similar capabilities. Outside of the ends of the curve are calibers like .22lr, .32ACP, and the .500 S&W.
The trick is to locate your handgun on that curve. Do you need a smaller caliber handgun like a .380 for concealability or control reasons? Or can you make a large from handgun like a 10mm work for you? I have a large selection of handguns, in most of the above calibers. (I don’t have a .44 or a 10mm- yet) I have guns by Beretta, CZ, Glock, Sig, Smith & Wesson, Taurus, and others. I have owned pistols by Colt and Kimber. I have revolvers and Semi Autos. I have each for a reason. Some I carry, others are only range guns.
Don’t become too much of a fanboi of one gun, brand, or caliber. Guns are tools. Buy quality. Learn to use them. I’m a gun guy. I, like many gun guys, have heard from my wife about how many guns I own. She thinks that it’s overkill. I just like guns.