Not only is Pixar known for crafting memorable stories but also for their creative use of Easter eggs that tie all of them together, however, the long-standing John Ratzenberger cameo tradition has been noticeably missing from several recent movies. Pixar films have the exceptional ability to touch viewers' hearts with their stunning animation and their raw portrayal of human emotion. They have a long history of creating award-winning and genre-defining films, Such as Up and Inside Out, and one way they honor their past is by incorporating certain elements in each of them.

https://screenrant.com/pixar-movies-no-john-ratzenberger-cameo/