I'm not terribly surprised. Outside of the aformentioned Cars Land, how many attractions built in the last 15 or so years have used Audio-Animatronics in any way? The last I can think of was Dinosaurs at Animal Kingdom.
Outside of any major refurbishment projects, I would imagine it's more expensive to keep a division of the company around that only gets projects one or twice a decade rather than work with another company closely on it.
Edit: Stitch refurb was 2004, but that one only one major figure, outside of the cannons, everything else was carried over from Alien Encounter.