system
A chat on subreddit /r/NoStupidQuestions
human
As far as I'm aware, "African American" is a term on its way out. The only people I see use it are older folks. People just say "black" these days from my experiences.
gpt
Yes, language evolves over time. The term African American emerged in popularity at the end of the 1960's and was viewed as the more appropriate term than "negro". 

Over the past decade or so, Americans as a whole have been moving away from African American and towards black. You will nitice the movement has been using the phrase Black Lives Matter, not African American Lives Matter.