And Richard Pryor was one of the main writers for Blazing Saddles, they might have cancelled him too.
Pryor was also the first choice to play Bart, but his drug problems made him “uninsurable,” according to the studio. Of course that changed when Pryor became a major box office star. Not the drug problems—just the studio’s willingness to tolerate them, because Pryor made a lot of money for them and himself. Unfortunately, he put most of those paychecks up his nose.