Yes and No
...
For any DA/SA gun, no safety, "decocker-only" IMHO is best..
With, in my case, SAO (both being 1911's) yes, as the CCW of them being cocked and locked, having not only the palm-grip safety, but the "thumb slide-lock safety" is key IMHO, as "both" need to be deactivated in order for the gun to fire, and the frame-mounted thumb s-safety is easily activated, quickly, to off, or on, without sacrificing a good/proper 2-hand grip..
Ls