I think it is funny how S&W product development has been an exercise design for manufacture-ability. The pinnacle of design was a registered magnum with the high polish finish, top strap checkering. slim and tapered barrel and the pinned barrel and recessed cylinder.
First came the model 28 - "Hey Sam, don't polish this one, let's just put this one in hot salt bluing and try to sell it. May not need the checkering either!"
Second came the deletion of the recessed cylinder and the pinned barrels, "Hey, can't we just make this barrel a crush fit? Who cares if you can see the edges of the rimmed cases?"
Third came the "bull" barrels and the "full lug" barrels. "hey grab that barrel before it is finished, it looks kind of cool, someone may buy it" The modern L frame 686 was born.
Fourth came the "unfluted" or how I like to call them "unfinished" cylinders. People actually will pay more for these since they are scarce!
Maybe fifth was "don't bother smoothing those seams, we will blend them in the blast cabinet!"
Here is the absolute rock-bottom of S&W design: