Bart is not Maggie!. Now are 5 episodes where the writers have betrayed the character. Poor, Nancy Cartwright!:
Season 20, episode 20 - "Four Great Women and a Manicure" (2009): Bart doesn't appear and it's not mentioned.
Season 26, episode 14 - My Fare Lady" (2015): The first episode where Bart has no speaking roles.
Season 31, episode 18 - "The Incredible Lightness of Being a Baby" (2020): Bart only gasps but no speaking roles.
Season 34, episode 13 - "The Many Saints of Springfield" (2023): Bart only laughs, but no speaking roles.
Season 35, episode 4 - "Thirst Trap: A Corporate Love Story" (2023): Not only no Bart's roles. Unlike the other episodes of my list, Nancy Cartwright didn't voiced any of her characters despite she was credited in the episode.
What happened to The Simpsons?. It was cool!. Bart was a very popular character in the 90's and today the writers betray him stopping making episodes focused on him and making boring episodes where he doesn't talk, turning him into other Maggie and downplaying the character!.