It's what you are used too and can shoot well. I can count on one hand the number of times I ever shot a gun double action. All my shooting is with Single Actions, or shooting single action. To "forget" to cock a revolver is ... well... impossible in the heat of the moment.... It's ingrained in you. If I need more than 4 shots of .44Spec or .45 Colt.... Then I am in bigger do-do than even a semi-auto with 17 (well 7 if you now live in NY or are they now down to 1 now?) can handle. The only reason I carry an CA Bulldog in .44Spec is 'lightness'.... Not because it is a DA. Of course in the great outdoors it is back to open carry of a SA revolver in either .44Spec or .45 Colt.
Fanning, in my experience, is not a fast way for accurate shooting... At five feet? Maybe.... and lots of practice ... and lots of rebuilt guns
.... But I personally wouldn't do it to any of mine.