Whoever modded you up as Insightful has never done any real manual labor. I worked at Home Depot for a few years and had to fill in as a loader a few times. That's hundreds of bags of concrete on to carts for people every day,(or 10 skids, 42 bags per pallet in a six hour shift). That's 80lbs, (36-37 kg), over and over, all day long. And reading TFA really didn't give any kind of impression that they were being used as often as that. While the idea of the exoskeleton has been awesome since Ripley first jumped into one, we are years away from anything that will even come close to replacing your average construction worker for strength and ability. That prototype suit has trouble dealing with slopes of any kind, slippery surfaces or can't assist with turning. The key point there being that turning while carrying a heavy load is the quickest way to a bad back. Even at 20kg you're asking for trouble if you turn the wrong way or repeatedly. Add to that the fact that using this prototype suit actually keeps your core from getting use it seems like it will make those types of injuries even more common for the wearer. Until they fix that its a pipe dream for long term use. Sadly, at best, that article is a few years too soon.