In more recent years, however, Washington D.C. has undergone significant demographic changes. According to U.S. Census data, the city's Black population has declined from over 70% in the 1970s to around 46% in 2020. Meanwhile, the city's White and Hispanic populations have grown.
So, to answer your question, it is true that the "Chocolate City era" of Washington D.C. is over in the sense that the city's Black population is no longer the majority. However, it's worth noting that the term "Chocolate City" has always been somewhat controversial, as it can be seen as both celebrating and essentializing Black culture. Additionally, the city's Black population remains a significant political and cultural force in Washington D.C., even if it is no longer the majority.
Not sure if this helps but it’s I tried the best I could!