The reason Disney and other big studios decided to move away from 2D movies and work more on 3D animated movies is that 3D animation was becoming very popular around the world. People saw the 3D CGI to be more immersive and something new compared to 2D animations that they used to see for decades. It seemed to be a good decision for their marketing because there was a huge competition with big studios trying to create new 3D animated films. Of course, Disney didn’t fully abandon 2D animation but it’s only used for TV series like “The Owl House” and “mickey mouse”. However, their 2D animated films didn’t show a lot of detail because it doesn’t require as much effort compared to creating a full animated film.