Excellent points on both sides
I have 3 H&Ks and a Sig. I love all 3, and like some others in the forum, I used the key 1 time, which was to unlock the firearm. I use other methods to secure my firearms just as if the internal locks never existed. The locks do not hinder performance or pose a risk as a point of failure.
What S&W wants to do is create a mechanism that will become an inherent point of failure, such as using biometrics or a device that must be engaged or the weapon will not fire. This is one reason I am not crazy about the H&K P7 series. the cocking grip makes you change the way you would normally hold and position the firearm in your hand. This being said, if Sig follows a similar design like H&K, they will still have my business.
Now on the other hand, a primary reason I will never support S&W, is the fact that the only reason they agreed to move forward with a a ill conceived idea of false safety, was simply to pander to the people who wish to ultimately strip us of our 2nd ammedment rights. Aside from that, I think they make crap. If any other manufacturer follows this path, I will toss them to the side as well.