I think people grossly underestimate how bad pistols are at stopping people. If you don’t hit CNS they can keep coming for more than long enough to cause serious of fatal damage. Even hitting a major artery to include a hit to the heart means they can fight on for 10-15 seconds per the FBI writings SOURCE. The answer is to get more cracks as hitting something that will stop them immediately.

I also think people overestimate the differences between pistol caliber performance. They are all roughly the same, only wounding within their path with no bonus for “energy”. The 357mag is no more effective than a 9mm in providing a physical stop. There is an ever so slight advantage in terminal performance by a 45AARP (and to a lesser degree 10mm) just by being slightly wider, but this is minimal and not worth the shootability penalty. Larger calibers than 9mm mean you are slower to get the next shot on target and more holes trumps slightly bigger ones.

There will be a lot of argument about why 10mm especially is the chosen caliber and 9mm is insufficient. But they will all come in the form of misinterpreting YouTube gel test videos or tall tales from someone’s wife’s boyfriend’s uncle who used to be a cop or some other nonsense.