If you eschew the 100% increase in capacity of a semi-auto for self-defense because you are worried about not being able to find a $.10 piece of brass, then perhaps you should re-evaluate what is truly important.
I like revolvers. Do I own any? Nope. I did the math. I have a couple of single-actions that are fun toys, but for the real world of self-defense, the semi-auto is king. I carry a firearm that is the same size as a J-frame, yet is capable of 2" groups at 25 yards and has 100% more capacity.
Why on earth would I choose to carry an inferior weapon when defending my life or the lives of my loved ones? Nostalgia is fine until it gets you or your family killed.