Disadvantages:
Old can be boring – Traditional animation can sometimes appear mundane. There is no comparison of quality between 2D & 3D animation; the latter wins hands down
Audience demand – 3D animation is fast capturing the market. Very few people prefer to watch 2D animation movies as compared to its 3D counterpart
Economic reasons – Not all 2D animation is simple to make. Sometimes, it takes less time and money to create a sequence in 3D due to advances in computer technology
Time is money – Several movie studios are giving up 2D animation altogether because it is time consuming to create cel-based animation templates, which can never be reused
Expertise – 2D animation requires a workforce that is able to draw & sketch. This is not mandatory for 3D animation