"Well I think the thing that a handmade film gives us is an artistic sensibility that is somewhat lost when technology is introduced. On the other hand, technology is amazing as it enables us to do incredible things. We had very distinct limitations on Sleeping Beauty. We were limited to five levels of cels. We could not go beyond five levels because then the image would become degraded. In the new digital technology there is no limit to how many levels you can have. So, there's a give and take. The technology enables us to do amazing things, yet the old hand drawn process brought a certain sensibility that I'm afraid we've lost because of that change."
January 1, 1970
https://en.wikiquote.org/wiki/Sleeping_Beauty_(1959_film)