Whatever Happened to Ms? The NY Times uses Mrs. even for Karen DeCrow, 1970s President of NOW

In the New York Times obituary for Karen DeCrow, the president of NOW in the 1970s, there are 8 uses of the title "Mrs."  Whatever happened to Ms?  (We don't use it in our info cards at City College either--or rather it's given as a choice along with Mrs. and Miss, which totally defeats the purpose of making Ms the female equivalent of Mr).  I think the use of Ms. was a fair, progressive idea, and I wonder why no one seems to care that it has been killed off.

Two years ago France moved forward.  Here's an excerpt from that report:

In Britain and the US, the term 'Ms' was available, in Portugal, Denmark and Germany only the madame form is used, and in Quebec it is seen as rude to use the term mademoiselle, she said.
Ms Muret added: 'France was practically the last country where women have been obliged to reveal if they are married, and we welcome the concrete results of our campaign to have this changed.'
The feminist groups were now calling on companies and private organisations to follow the move by removing the terms from their own documents, she said.

The nationwide changes come after two towns, in Britanny and Normandy banned the term 'mademoiselle' two months ago after pressure from a local women's groups.

Read more: http://www.dailymail.co.uk/news/article-2104826/Au-revoir-Mademoiselle-France-bans-word-Miss-official-documents-suggests-woman-available.html#ixzz35poxrn00
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So why is the United States moving backwards?