Much as I love my 1911 pistols, a handgun in today’s military of little consequence in the big scheme of things. The new M45 is a specialized tool in a specialized role.
If I was in charge (shudder to think of it) I’d let NCO’s and officers carry any pistol or revolver they wanted, if they didn’t like the GI one and they could qualify with it.
As a “non-combatant” corpsman i carried the m1911a1 in Nam until it was stolen. I replaced it with a sawed-off 12 gauge pump shotgun. I was never questioned about what i carried.