The P320 has no user safety. The military M17 DOES have a thumb safety, similar to a 1911.
The original concept of the P320 had a Glock-style trigger safety. This concept was ditched for the production design.
It looks like the Apex style, and a skeletonized style, trigger are going to be the concepts they go with now.
Im personally not a fan of having ANY safety on a dedicated combat firearm. The only "safe" weapon is an open/unloaded weapon. I carried a P226 and P220 on duty for over 13 years for this very reason.