I'm still waiting for my 5cd Live Unreleased Betty Carter set... I can't believe people forgot how important she was. For me, there are five female jazz singers I have to listen to... Billie, Anita O'Day, Shirley Horn, Abbey Lincoln and Betty Carter. I've got the Anita set. I assume all the Billie material has been released. Abbey Lincoln had a small box set years ago on another label. That just leaves Shirley and Betty.
Given how many instrumentalists praise her, I don't know why there isn't a greater recognition of her. If Mosaic can find some Lennie Tristano stuff, why not Betty?