Disney animation films started way back in the 1940s with Snow White and the Seven Dwarfs and they’ve been steadily releasing them ever since. In those releases there are utter classics (Bambi, Dumbo, Pinocchio, Peter Pan, etc) and there are a number of forgettable films. They’ve all been wonderful children’s entertainment though, which is what Disney has been going for all along.
That’s why it was such an oddity when The Black Cauldron was released in 1985. It was an adventure story about a young man trying to save the universe from an evil king. It was PG thanks to its slightly more adult themes and at the time that was a big deal for a Disney animated film. It’s also probably what caused the movie to be a failure, unfortunately. Disney has since released a few other PG animated films but the rating is no longer an issue like it was back in 1985.