That is why, to me, the revival of Carousel was an amazing concept. It was racially mixed, with no confusion. Nothing had to be explained as to why this one was black and this one was white. It worked perfectly. As it can with certain shows. You're A Good Man, Charlie Brown, for instance.
I once saw a high school do Little Shop with a black Audrey, and to be honest, it worked.
Personally, the way I feel about a black Glinda, like many others, I do not see it. However, Elphaba, Morrible, Boq, Fiyero, even Nessarose, I do.
Imagine putting a white girl in the Dreams. (Michelle Morris, maybe?)
True, the show is based on a true story, so it wouldn't work.
I think, in truth, people have Glinda set in mind as to what she looks like, thanks to the movie.
"Do you know what pledge time is, Andrew"? said the PBS Executive.
"Yes", Lloyd Webber replied. "My 50th birthday special must be one program that gets done a lot."
"No", mused the man from PBS heedlessy. "Not so much. Our Stephen Sondheim Carnegie Hall concert. That's a big one."
Spoons, forks and knives seemed suddenly to suspend their motion in horror, all around the table.