Most of the truly good singers that I've heard or know some how don't find there voices fading that much at all while they're aging into their golden years (what's your opinion 40's 50's 60's or 70's, I hope 70's) & then by the time that it's a problem they've slowed down & don't really want to do the circut or tour anymore. Some voices mellow out with age, which should not be a problem as their voices aren't for the worst just changing & many times for the better. I do feel for you for those that you think can't cut it anymore.

Barry