Alas, DirectWrite doesn't support ClearType, so many applications including Microsoft Word (!!) no longer use it – they just antialias with grey pixels.

https://en.wikipedia.org/wiki/ClearType#ClearType_in_DirectW...

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Some interesting comments from the article that didn't work out this way in the end:

> Everybody’s favorite face will be Constantia by John Hudson.

> Cambria will be the default font in the next Microsoft Word, taking over the spot long owned by Times.

> I’m not sure how much need there is for a rounded sans [Calibri]

In the end, the new default font in Word 2007 was Calibri, which was surely by far the most used of these new fonts. It was easy to switch to Cambria (and it was the default heading font for a while) so that was fairly well used, while Constantia is essentially unknown.