QUESTION for Blues/Rock&Roll PURISTS: May I have your consideration for this Question's Details?

I don't think Muddy Waters would have done it had he been alive and asked to do it. one look at the film and it seems that Keith and friends were regretting their own involvement. Chuck's ego was so big that he had no respect for anyone, even those trying to honor him. Muddy was the opposite. his love and respect for his fellow musicians, and theirs for him, shows in all of his recordings. I've never heard any group of musicians having so much fun recording than on his album Hard Again. Check it out.