"Pixar could afford MoCap or any tech they wanted.
So If Pixar had 17 rigs for one mesh
,it's just cause that's the way they wanted it done.
Not cause that's the way Pixar had to."

I don't buy that.  For starters, what's your mocap source going to be for a toon figure with proportions and movements that don't resemble any existing humans or animals?  I'm sure if there was a way to rig a single instance of a figure to bend properly in all situations Pixar would be doing that and not paying to do the rigging sixteen additional times.  So, if any Poser creators come up with a way to make a figure that bends perfectly in all situations don't sell it here.  Sell it to Pixar.