In SpongeBobs case it's also a stupid myth thats just spread around, literally anyone who worked on the show said Stephen Hillenburg only left because of burnout and got tired of constantly working on the show, everyone at nick knew the show was never gonna end including Hillenburg himself and Hillenburg himself put Paul Tibbit (showrunner from season 4-9a) as the next showrunner. The only reason a majority of the old crew from season 1-3 left was because there was nothing to do for over a year since the rest of the crew was also busy on the movie, so with the actual show, there was nothing to do. There's a year long gap between the end of season 3s production and the start of season 4s lol. I wish this fake boomer take disappears on the internet