Advances in bullet technology have made 9mm almost as effective as .45 was 10 years ago. Of course that goes for .45 bullets as well. But the truth is all pistol cartridges are marginal at best.
L
Well, I’m not carrying my .30-06 in my car or on my person downtown. :-)
Everything is marginal compared to what is better. But if what is better is not a viable option, it’s irrelevant. The best of the “marginal” becomes the best, period. ;-)
A .410 Judge with shotgun shells is the best up-close defense weapon
It also fires .45 bullets too.
Best of all worlds