I think part of why Chris Cross went MIA was due to music changing. Music like his and say Simply Red went from being Top 40 to Adult Contemporary. AC artist don't get the exposure Top 40 artist do and the Top 40 music scene was becoming more electronic.
That's kind of what I meant when I said ten years is an eternity in pop music. You really have no idea what new trend might come along to render her style of music irrelevant.
Here's another example: New Kids on the Block. Those guys were HUGE in 1989 but they were done about three years later. And a big factor, other than their teenage fans getting older and realizing their music was shite, was the explosion of the whole grunge/alternative rock scene.