This is interesting.
SIG has lost 2 cases in court and is appealing. They won and settled others. The Army, Navy, and Marine Corps have not "grounded" the M17/18 despite several accidents with injuries. They have passed (and continue to pass) DOD (regular LAT/lot acceptance testing), and CA DOJ safety tests (the M18 is on the approved handgun roster there).
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When the M9 slides were failing (6 in service, 12 in testing) Beretta sued the government for defamation in court and won. The government had to pay for the M9 slide modifications, not Beretta. DOD went on to buy about 200,000 more pistols in follow on contracts to the original 300,000 pistol contact.
I suppose SIG is hoping their lawyers are as good as Beretta's were.
Did I trust my M9? Yes. As I trusted my M15, M1911A1, and M11. Would I trust an M18? No. Good thing I'm retired.