I agree that the actuality becomes less and less of an issue. I also know that a large number of American black people have white and/or Native American family history, so “mixed†( a phrase I admit rankles me a little bit) is the norm.
The stigma, however, continues to be of real importance as Americans struggle with our language and our history. Things are going to be prickly for a while as we all come to terms.
We're all mixed! I have no idea how to describe "race" anyway, although I'm about as "European" as one might find - yet, I have, according to DNA testing, about 1% "Cameroon/Bantu" DNA. I guess I've been "passing" all of my life...
What is good about "mixed" descriptor is that it is ambiguous. I
like that ambiguity. I think it presages the obsolescence of the concept of "race" altogether.