https://techcrunch.com/2018/11/06/twiice-one-exoskeleton-furthers-the-promise-of-robotic-mobility-aids/

Few things in the world of technology can really ever be said to be “done,” and certainly exoskeletons are not among their number. They exist, but they are all works in progress, expensive, heavy, and limited. So it’s great to see this team working continuously on their TWIICE robotic wearable, improving it immensely with the guidance of motivated users.

TWIICE made its debut in 2016, and like all exoskeletons it was more promise made than promise kept. It’s a lower-half exoskeleton that supports and moves the legs of someone with limited mobility, while they support themselves on crutches. It’s far from ideal, and the rigidity and weight of systems like this make them too risky to deploy at scale for now.