An artist’s work can be easily recognizable by his styles. The brush strokes, texturing, color palette, mood, and type of paint. Unsurprisingly, different styles or techniques can help communicate different messages to viewers.
2D animation has never really lost its popularity in the east. It is a respected and mastered art. However, this appreciation and nostalgia of 2D animation is creeping up the west again. This might be due to the easier production and simplicity with a resembling financial benefit to 3D animation movies.