I would not feel under-gunned with an S&W Model 10 snub-gun, during personal time. (I work patrol, for a big-city PD.) I would probably want to have a secondary weapon, "just in case," but that is true when carrying a G19, too; continuity of fire is just one reason for a second weapon, and not the most important, IMHO. (Among other reasons, a balanced load is better for my aging back, and I am functionally ambidextrous, so toting two weapons just feels "right.") As recently as 2006, I was still primarily carrying SP101 snub-guns during personal time. When I retire, as soon as late this year, and am again a private citizen, I will no longer have to use an autoloading "primary duty pistol" at work, and may well revert to revolvers as normal daily-carry weapons.
To be clear, I am not trying to persuade anyone to carry a second firearm. This is a personal decision, and a topic better-suited to Strategies and Tactics section of the forum.
I have a set of super-nice BluMagnum K/L-Frame round-to-square-butt conversion grips, that I bought several years ago, awaiting the perfect host, and a well-preserved, pre-keyhole snub-gun would be a leading contender. This would be a nice retirement gift for myself.