The lock, I think, is a tip of an iceberg. Some buyers, I’ll call them “traditionalists,” not only object to the lock, but also other design, material, and quality control issues in Smith’s current production that they don’t like.
I have quite a few S&W revolvers, the absolute newest being a 3" 65 with hammer mounted firing pin. I only got it because it was IMPOSSIBLE to find a Model 13 here.
My objection to current S&Ws is first and foremost the lock, followed by mandatory (at least for a while) round butts, then stainless steel. I have no objection to MIM parts. I'm a big Dan Wesson fan, so I have no inherent objection to two-piece barrels, although lock aside, I'm not a fan of S&W's take on the concept.
My objections to the lock have been previously stated and don't need to be restated. Suffice to say I will NEVER buy an S&W revolver with the lock, at least the current incarnation of the lock. That's absolutely non-negotiable.
I HATED not having the choice of square butt grip frames. Putting big, uncomfortable square butt grips on a round butt revolver doesn't magically turn it into a square butt revolver. I have two round butt revolvers, a 36 and a 65, both of them CCW gun. I will tolerate round butt ONLY in CCW guns. A round butt 4" K or L frame or any length round butt N frame gun is just silly to me.
I don't like stainless steel. It just doesn't look good to me. I have ONE stainless gun, the Model 65. If I could have found a 3" 13 for anything within a mile of a sane price, I'd have one of those instead. I couldn't, so I have the 65.
Product-wise, S&W left me behind a long time ago. A lot of their recent product looks like Vin Diesel should be shooting space pterodactyls with it. That's why save for that lone 65, every one of my revolvers is AT LEAST 20-25 years old. Which is as it should be. You'd have to be pretty stupid to spend $800-1000 for something you don't like or need.