That comment might make sense a decade ago (when it was mostly relegated to academic journals)[1], but it's been in common use (at least in the U.S.) for years.[2]

[1] https://en.wikipedia.org/wiki/Cisgender [2] https://trends.google.com/trends/explore?date=all&q=cisgende...

Lest we forget, there are a lot of people out there who don't belong to the so-called chattering classes. And that's ok.

People learn new things every day

So envious of your username :)