LOL...there are a LOT of cartridges still in production that are obsolete. Perhaps people should arm themselves with a .38 Long Colt or a .32 Short Colt, or a .32 S&W Long or a 9MM Largo or a 7.63 Mauser or one of the numerous other obsolete cartridges. Just because it has a long production run, doesn't give it any advantage or make it more deadly than another caliber. The .22 Long Rifle has been around longer than any of the ones you listed. Gonna use that as your primary defensive weapon? Considering the number of .38 Special and .357 Magnum guns made and still being made, it's no surprise that the round still exists. That DOESN'T make it the best round for personal defense.
Bigger holes make deader souls.