Sometimes these discussion remind me of some fellow motorcycle riders that I know, who are always looking at the next gizmo to add to their bike. Like a golfer who never stops buying new golf items, the biker loves his bike and buying new gadgets keeps him connected to his love when he can't actually be out riding. So we gun lovers, who probably can't get to the range as much as we would like, and almost never have a need to actually use a gun for self defense or anything else, spend our time connected to guns by our time on the internet or by buying and trying various calibers, types ammo, brands and types of guns, etc, etc. Most of us certainly do not NEED a large number or type of handguns, but we like to be doing things with and about guns, so its fun thinking about and arguing about whether the 380 is a good self defense caliber, or whether a revolver beats a semi, or a shoulder holster beats an IWB, etc.
I'll just add my own two cents to the OP's question. I prefer 9mm or 38 Special +p for self defense, but there are times that for carrying comfort I want something really small and easy to conceal. That's when I take my Ruger LCP loaded with 380 Hornady Personal Defense ammo and I feel very comfortable with the choice. And since I have yet to ever need the gun that I am carrying, everything that I have carried has done the job so far!