Mantis: a “highly scalable force feedback device”
My take on this
It was never going to be strong enough as a robot arm, so they turned it around and made it into an interface device. The amount of room needed for the linkages to move around is not practical.
On the plus side, it’s got a lot of the hardware that robots use and may serve as a great education for people starting out in the field: encoders, position sensors, DC brushless motors, control, and more.