Correct me if I’m wrong, or confirm if I’m right, but I’m pretty sure that insiders have said somewhere on this site that this was looked into, and the animatronics were determined to be too old and too large to be worth moving. From what I remember, they would have had to be completely rebuilt. So no, not really a missed opportunity, just an unfortunate circumstance. And to answer your question, they probably recycled what they could and threw out what they could not. A sad fate for such amazing animatronics, but fickle progress doth march on.