Oh, I agree (even though some will try, LOL!). But Grease, on the other hand, has been done to death.
When I was younger, I got to see Richard Harris as King Arthur in the stage version of “Camelot”. The man couldn’t sing his way out of a bag, but I was mesmerized by his performance, and adored every moment of the experience. I can’ help but think you would never see that kind of casting nowadays.
I saw Yul Brenner in The King And I when I was a little boy at the Muni Opera in St. Louis. It was free.