Lots of rounds is just one positive attribute. An extremely low probability of not going bang is another positive attribute ... in fact, it's more important to me than the first attribute. And an extremely powerful round is a third important positive attribute (at least for me).[...]
There is nowhere I would prefer to defend my life a 38 snub rather than a Glock 19/23 (or 26) and I carry accordingly.
I realize that some semi-autos are fairly reliable, but people DO practice clearing drills with their semi-autos. I have much more confidence that my 629 revolver won't ever let me down, than I do with my 10mm 1911 Kimber Eclipse.