I bought an S&W 637 Airweight six years ago. If I had known then what I know now, I would have bought a 642 instead. I shoot the 637 about once a month (quite enough for ANY Airweight, much less an Airlite!), fifty rounds all double action. And there is the point: never single action. I practice what I bought that weapon for: home defense. In other words, double action engagement at five - seven yards. Actually, that revolver is how in a hidden location up front in the house. My primary home defense weapon is a 4" 686+, loaded with +p .38sp. And some other stuff you don't have to know about.
Cordially, Jack