I think putting a lock IN a gun is a stupid and unneeded idea. I have my reasons, and will happily discuss them if desired. However the fact that a gun has a lock in it isn't a deal killer for me, other than the S&W lock.
S&W put the lock in an obvious place AND worse, changed the shape of the cylinder latch to do so. THAT change is what puts me off the most.
S&W used essentially the same shape & style latch on K & N frame guns since around 1900 and it, to me, is one of the style features that says "S&W".
For me, its not about the lock as a lock, and its not about the possibility of the lock "self activating" (failing in the on/locked position) but its about changing the look and style of the gun.
Its their guns, they can do what they want, but its my $ and I'm not going to pay for something I don't like the looks of.
I think so many of us "old timers" held a serious brand loyalty to S&W for so long because S&W produced quality and kept doing it for so long. Things went down hill when Bangor Punta took them over, and they never really came back. Not saying they aren't quality now, but its a different quality. Sure there's the argument about how the changes have been economic necessities, things they had to do to keep costs competitive, I understand that.
However, I don't want that. I want them made the way they once were, and stopped being during the 80s. And there are more than enough of the older "good" ones to meet my modest needs and desires, so I won't be buying any new ones with features I don't like.
Feel free to do the same, buy what you like, and what pleases you.