Note that two of the OP's links are about the same proposed lawsuit, one
https://www.thefirearmblog.com/blog/2022/03/08/sig-sauer-lawsuit-p320/#:~:text=SIG Sauer Files Lawsuit Alleging P320 Misrepresentations By Attorney,-Posted March 8&text=SIG Sauer filed a lawsuit,internals of the P320 pistol.
is SIG filing suit against an attorney who previously represented a plaintiff in one of the P-320 lawsuits.
From TTAG's investigation last year into the "facts" alleged in some of the suits:
Not much detail is provided in any of those other claimed incidents, but a few stand out. For instance there’s Lieutenant Thomas Ahern who was was “performing a routine function (test) of his P320 when it fired at him without any force towards the trigger, resulting in the bullet impacting his left thigh.”
Who function tests their firearm 1) with a round in the chamber, and 2) when it’s pointed at an extremity?
And then there’s Gunter Walker, a civilian, who says his P320 fired on its own “when he placed the weapon down on his nightstand, shooting him through the palm of his left hand.”
Have you ever put a handgun down with your palm in front of the muzzle? Would you?
There’s also an un-named Texas gun shop manager who says a P320 fired “as he cleared the weapon, blowing off one of his fingers. The weapon was out of battery when it fired.”
First, clearing a loaded firearm with a finger over the muzzle doesn’t exhibit even cursory adherence to the Four Rules. Second, pardon us if we’re more than a little skeptical that the P320 in question — or any other handgun — fired when it was out of battery.
Again, these are examples the plaintiff in this case is using to support his claim that the P320 is prone to “un-commanded discharges.”
Given that the preponderance of these cases are law enforcement officers, my strong suspicion is, having read through thirty-some allegations, that it's likely these were mostly, or all, negligent discharges where the officers involved were attempting to avoid reprimand, suspension, discipline or termination.
I was personally familiar with an ND by an officer caused by the officer, who was wearing an unauthorized shell jacket underneath his issued jacket -- the plastic toggle from the waist drawstring fell into his Safariland duty holster as he was going on watch, and when he holstered his pistol, somehow the plastic toggle of course went into the trigger guard and pulled the trigger as he inserted the pistol into the holster. In the past eighteen years, every single ND I became familiar with (in my area) was proven to have been caused by the officer having his/her finger on the trigger, either when holstering or using a clearing barrel.
So to the OP, I would say that it
appears SIG fixed the pistols' problems, and perhaps, the new lawsuits might just be cases of lawyers familiar with the issue going after the low-hanging fruit and/or people trying to avoid being held accountable for NDs. I like my 320s (haven't dropped either of 'em, though)...