“Everything is a mess,” Rodney Brooks says, as we make our way through a brick-walled room filled with robots in various states of assembly here at Rethink Robotics’ headquarters in Boston, Mass. The mess, we should point out, makes Brooks, the company’s founder and CTO, very happy. It means things are busy. The past few weeks, he says, have been particularly hectic. That’s because today Rethink is making its collaborative factory robot Sawyer available for purchase.