9mm is now just as good as .40 S&W, .45 ACP, and 10mm says those new millennial firearms experts.
By "just as good" is the wrong way to look at it, it should be "just as bad"
No duty caliber is creating hydrostatic shock, so all that matters is expansion (with modern JHP's, there is little difference), capacity (9mm wins) recoil impulse (9mm wins, .380 recoils less, but only a few select loads will expand while offering good penetration) and cost per round.
9mm doesn't do the best, it just sucks less, because the extra little bit of power you get out of a .40 or .45 #1, doesn't matter, and #2, costs you things that DO matter.
Stoping power is the single most retarded thing on earth.