The AA museum as a concept didn't exist until an act of Congress in 2003. And the museum didn't start their hip-hop archiving because some random white lady begged the out of touch dinosaurs at the top. Russell Simmons and some industry heavyweights were behind it:
http://americanhistory.si.edu/press/releases/hip-hop-comes-smithsonian
I never even heard of this person before today but it looks like she's been busting her ass making this her life's work. It's not even the first African American exhibit she's spearheaded, just the first one in the era of twitter mobs.
https://timothyanne.com
Ya'll are way out of bounds with some of these critiques. She's been on this from the ground floor with the blessing of people in the industry
whose works are actually in the exhibits (why the hell else would Chuck D cape for her? Makes sense now) and her historian colleagues, and she's been chronicling African American history, from multiple angles, since half this forum was in grade school.