Not too thrilled with the look of Mickey in that shorts link...I think I'd rather have 2D die. HAHA....just kidding, but thats hideous.
Also, the drawings that are being Xerox'd are usually not the original animators artworks, they are 9 times out of 10, the artwork of the clean up team. Though some animators work fairly clean, not many of them do. They are more interested in the motion of the character and not so much about making him look identical to the previous piece of artwork. That duty falls upon the clean up artists who are responsible for making each character look identical in every frame. So technically, you are probably seeing the clean up artists artwork and not the artwork of the original animator.
Animator --> Breakdown Animator --> Inbetweener --> Clean Up
Those are the hands that the artwork ventures to during production.
I see Xerography as just a step in technology...I don't want to call it a fad, but everyone did it and now everyone does something else and in the future everyone will do something different. It was more of a stepping stone. It was probably used for 15-20 years and then technology allowed them to do things faster and cleaner. I don't see it so much as the "old way", since technically it doesn't go back all that far in animation history, the "old way" was hand inked and painted cels.
Also, the Tangled that everyone knows, is not the Tangled that Glen Keane imagined. That Tangled got thrown in the trash and we got what we have now. The test scene that was released from the original concept looked 2D (even in a way that Paperman does not), but was obviously not. It's unfortunate that his vision will never be seen. It would have been groundbreaking.