Remember how Apple salvaged that defunct sapphire plant in Arizona by turning it into a data center? That facility might soon become more useful... if not as useful as you might think. Apple has proposed expanding the Mesa location to make data server cabinets. While it's not initially clear why it's making the move, a Business Insider source claims that this is about consolidating data center production. The company normally builds the technology on-site at its data centers, the insider says, and it now wants to switch to a centralized model where it ships everything from Arizona.