I haven't seen a black american hired in tech in a decade. The last black american I saw in tech, they hired an indian manager, and the black guy was the first guy he fired.
Since then the only black guy I saw hired turned out to be from a suburb in africa.
My experience is the beneficiaries are people with well off parents from other countries.
Or white women.
The only time affirmative action benefits anyone is when there is an active, real discrimination against non-whites. That may have been the case 50 or 60 years ago, but today no one would dare be discriminatory in a way that could be linked to them publicly, so I doubt that it does much anymore.