Looking at Tom Givens' latest newsletter, his analysis of capacity struck me as useful. The idea is a good take on the caliber debate. He was talking about capacity and how long you could stay in the fight.
Assuming about 250 milliseconds between shots for the average person - a J frame keeps you in the fight for 1.25 seconds. An 8 shot 1911 for two seconds. A Glock 17 with 18 rounds (one chambered) is 4.5 seconds. That's a long time in a fight.
Given the lack of real differences in stopping power with modern rounds, that's telling.
If I misread it - sorry.