Well that's certainly news to me.
I guess for now on, whenever I write a business letter to a lady I'll have to call her first and ask her if she's married.
Bridal showers are obviously a social situation...it just struck me as odd that I was given an address list marked Miss/Mrs. and was told ‘no Ms.’ I didn’t mean “Ms.” had been eradicated from usage...just a little anecdote I posted from my interaction with a 20 something maid of honor (planning a shower for her sister).
I worked at a mortgage company in the mid-1970’s and they were just beginning to use Ms, LOL.
The big debate was: should we used a period at the end.
Some customers would write back requesting that we use Mrs. There was much anger because those bra-burners were forcing stuff on the rest of us.