whatever the rest of the armed citizens chooses makes no difference to me. A DA revolver in .357 is good enough to do anything against pretty much any human being. I have carried a trooper in inside jacket pocket. I have carried a K in the same situation. I have carried in a vertical shoulder holster. I spent decades with these guns before I bought my first semi. It's not hard to learn to shoot a revolver, concealment isn't that hard. If you can hide a 1911 you can hide a K. Same stands for a SA revolver, the size difference isn't enormous.
Sure, a bunch of rounds of nine can be put into a person. The heavy magnum is a great choice and eventually with practice, a double tap is easily done with either system.
I can put accurate rounds into target just as rapidly with my revolvers as I do with my semi. Shooting those revolvers SA is almost as quick as Da. A SA isn't the same, but anyone can train themselves to make that second hammer cock and shot before the target recovers from the first round, unless the guy is just tougher than wood.
Don't dismiss revolvers for power, or concealability for part of the year. It also helps a lot if you don't wear a wifebeater shirt, flip flops, and baggy shorts.
Success with a SA revolver is going to be almost all about training. Concealment is another issue. honestly, I have put whatever I have handy into my jacket. Isn't having the thing on your person a huge part of success?