They all but abandoned Astro, their home robot. My suspicion (and information I've heard internally) all but points at them only using Astro as a testbed for self-navigating warehouse robotics, and now that they got what they wanted out of it, the Vesta team basically got thrown to the wolves.

They bought a company that did warehouse robots called kiva before that

https://en.m.wikipedia.org/wiki/Amazon_Robotics