@glitzersachen @ZachWeinersmith
My particular use case is in person, 'Excuse me sir/ma'am'.
Interestingly, there is the written english thing, though I'm not sure how much it's in use, of just M. <name>, which I've seen in letters and even emails. The implication is it can be Mr or Mrs or Ms and it's formal, but it's certainly genderless. Doesn't fit with what Zach was talking about in the use case (it's very 'proper'), but this just touched on something I have been feeling for a while.