2-D animation involves more labor and more budget. I see it as this- the longer a person takes to do something, the more money is needed to pay them for their work (working by the hour). There are other factors too but if we consider it from that standpoint- and also consider that 2-D animation means creating several frames to emphasize motion.. then it’d be time-consuming. In releasing Kitbull, a modern Disney short, work was more efficient and the cost was less. Sure, it was 2-D and it can contradict the point; knowing how it was made can make it easy for u to understand. In this sense, using 3-D for animation, as they did, made everything quicker and it involved less money. Its good because it means you don’t need to worry about your own skill for the expectation and etc.
I done research and found that some sequences in animated movies were reused. So it further proves my point in why 2-D animation began to be turned away from in demand for the industry.
An example of thriving 2-d Animation is Anime. I guess thats the fine line between Disney and Japanese animation- which makes it more appealing if you think about all the work put into making Anime.
In our current time, I start to realize that anime is taking the 3-D approach too. Like a anime called Chainsaw man. It used 3-D animation for fight scenes (Which appeared to take more effort as its more dynamic).