It depresses me, just a little mind you, that in researching traditional 2d animation software, almost to a one, every major software maker considers "traditional" to mean vector animation.
Pushing biezers and nodes on vector paths around to adjust your lines is NOT traditional animation. Watch Glen Keane animating a few rough frames in front of a class full of students. You have to feel your way through the movements. You have to feel the mass of the objects you're pushing around with your pencil. Having worked with vectors in multiple programs (Manga Studio is the best one for artists, in my opinion), and having studied how to animate traditionally under Mr. Mattesi, I can tell you the sensation is completely and utterly opposite the one that feels like you're producing organic movement, when working with vectors. There just isn't any comparison. If "Tarzan" or "Beauty and the Beast" used these packages to animate, I shudder to think of the results.
Why is it that we can make so many different programs for 2d animation and yet hardly any of them seem to understand that aspect?
*Note: TVPaint seems to be the exception to the rule, still utilizing a bitmap rasterized format. Unfortunately, it's also expensive as all get-out. Most of the others aren't cheap either, but it seems you have to pay a premium to go truly traditional. Heck, even ToonBoom Studio reserves any and all bitmap features for their top tiered products. Bwhah?