Haha, Guy is a fantastic player, and that lines up with stories I've heard from other pros working with super-duper-mega stars.
"Am I in or out? Do they hate me? Do I have the gig?"
I was fortunate to do sound for another of Madonna's bass players, Bill Lanphier (I think he did the Like A Prayer tour).
This was in San Francisco, early '00s where he was playing with an insanely tight and quirky Bulgarian folk fusion band called Top Dog Run.
Time signatures might change every other bar from 7/8 to 11/8 to 46/137 to the speediest oom-pah polka and back again

But it sounded so natural and there were people dancing outrageously to it all night.
Bill put his little GK combo on a chair in the corner and it carried the room, I barely had him in the mains.
I had a great talk with Bill that night and regret that I never took lessons from him before he passed (he lived about 10 miles away). But seeing him play and knowing the other things he'd done was a lesson in itself.