While he didn't actually lose control of the company before he died, he was just keeping his fingers in the pie so to speak (strange expression!) . I don't think sales were all the good of movies- people were getting tired of 2nd rate schlocky stuff that just rode on the coat-tails of earlier Disney greats. Eventually the Disney corp. created Touchstone to create and distribute less "Disney-ish" (sweet and gentle) movies, and later, television, but programming that would make more money. Even today, Disney is better known for merchandising the trademark and for its theme parks, than for its recent movies.
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A Parent, old geezer, and occasionally right. Good judgment comes from bad
experience, and a lot of that comes from bad judgment.