@BashStKid The weight of kit an infantry soldier can carry in battle is about 30kg. More than that and they can't fight/move. Armor … it shouldn't surprise anyone that a suit of full white plate circa 1600, with weapons, weighed 30kg!
The next generation's going to need motorized joints and fast-swap battery packs.
@cstross @BashStKid That's the real "War. War never changes." throughout the millennia.
You can stick 30 kg of stuff on an infantry soldier. It's only how you use that budget that varies.