My mom and I read about Frank Oz and what I think happened was that he was very unhappy with the way Disney was treating him and he decided to take the easy way out. It's hard to believe that Frank Oz was the original voice of Miss Piggy and Grover and Yoda and I think that since Frank Oz did a lot for Disney during his time working there they should give him a nice amount of money. But ever they replaced Miss Piggy's voice actor I think that's what really hurt Frank Oz and since he still appeared at Star Wars conventions talking about his Yoda role Frank knew it was time to move on. But now Disney is gonna have to find a replacement actor for Yoda for their Star Wars cartoons because the current actor voicing Yoda Tom Kane suffered a mild stroke in December 2020 and they are still searching for a voice actor to replace Tom Kane. I also wonder due to Frank Oz's departure Disney will lose The Muppets and sell it to someone else?