Personally, I don't need a DAO revolver to
force me to practice DA shooting. DA shooting can be accomplished just as effectively with a conventional double-action revolver. As I see it, the only reason to have a "hammerless" (spurless) revolver is to lessen the chance of the revolver snagging on the draw-and that's reason enough to have one (or more
).
Even in a self-defense scenario, it's not hard to conjure up reasons, albeit atypical, when being able to shoot a DA revolver in the SA mode would be advantageous. And the chance of a DA revolver snagging on the draw can be largely obviated by keeping the ball of the thumb on the spur of the hammer. There really aren't many downsides to a conventional double-action revolver when comparing it to a DAO revolver.