To be fair, top-40 radio was much more inclusive than radio of today. And even more inclusive than Internet radio, which tends to segregate itself into repetitive genre play. Don Cornelius was the glue that bound all the soul happenings of the 70s and 80s together. He had the best R&B, funk and soul bands on his show, as well as solo artists, black and white.
Don Cornelius was a television and music visionary, wearing a stylish suit and interviewing the hottest acts in his low, rumbling voice. He had us all line dancing every week, which was a great joy. He provided much happiness over the years and I already miss him.