I bet soldiers are hankering for exosuits to support the lower back (Once battery issues and are solved et cetera). I imagine soldiers are going to love them in the future.
11 kilograms for a m60 alone is heavy, but I imagine that the ammunition required for sustained fire would be pretty damned heavy too. Then you have all the other bits like rations, water et cetera.
With some of the configurations issued to active military personnel today you can certainly see how it can do significant damage to soldiers backs in the future. Combining all the weapons and ammuntion plus essentials with the addition of possibly ceramic or metal plate inserts and kevlar garments depending on situation...
Of course, some of those inserts can stop several 7.62x51mm rounds, so I imagine there is some love for them despite the weight.