Colt revolvers because of the sudden death cylinder lock needed constant repairs. The much vaunted Colt Python when used by police Depts needed to be re-timed every 6 mos. The Colt system because it locks the chamber mouth to the forcing cone only needed slight wear to lock off center and bind the action.
The S&W revolvers are engineered with just enough play at battery position to freely align the chamber mouth and the forcing cone. This allows the S&W to compensate for wear and ammunition variables in the critical timing of a revolver. Thus the S&W Mdl. 10s and Mdl. 19 etc. sold much better. It is a matter of market choice that put Colt out of the DA revolver competition.