While I believe that examples of lock failure are beyond rare...
You are free to believe as you wish. I am fifty-five years old, and I have never known anyone who died of heart disease, although that is reputedly the #1 killer of adults (especially those in my age group). My own lack of first-hand experience does not change the facts, nor does it matter one whit to the Grim Reaper, who may be looking over my shoulder as I type...
At one point I owned six ILS-equipped S&Ws...then It Happened
to an acquaintence. He was dry-firing his 360 at the time. If it can happen, even once
, while dry-firing, I have no confidence in the design. I sold all of my ILS-equipped S&Ws (most of which were the Scandium Ultra-Lightweights that seem disproportionally represented in Auto-Lock instances) and slowly replaced them with older and often heavier models.
The S&W site once had a thread that went on for pages about Auto-Lock occurrances, and the many who chose to argue pro or con. While the arguers outnumbered the people who had actually had It Happen
to them, there were (IIRC) well over a dozen, and perhaps two dozen instances. The board subsequently changed ownership, and the new owner made his opinion known without saying a word--all of the evidence disappeared overnight, and any further discussion was shut down rapidly. I don't spend much time there anymore.
I actually bought a 4" M25 Mountain Gun in .45LC recently--the previous owner had removed the lock bits and put them in a small zip-lock bag. Price was right, too
Those parts are still in that bag, and they will stay there until I sell that gun or drop dead (of heart failure, no doubt) one day...at which point I really won't care.
On the other hand, I have a Taurus with a lock that is subtlety placed in the hammer of the gun that does not trigger a negative emotional response.
Actually, if you look at the design, the Taurus' lock works on an axis 90* from the recoil (ergo, the lock is designed to be unaffected by the recoil impulse), where the S&W lock is on the axis of recoil. So...in my case at least, it is not an "emotional response", but a fact-based, mechanical engineering-supporteded response.
An example of Taurus using innovation instead of imitation...and in this case, it worked well.
Best regards, Rich