CDDA is weirdly realistic feeling with how looting works out in it, you're mostly hindered by the volume of the stuff you're taking, you need bags to put shit in because it's way faster to move a bag full of stuff than it is to move all the things in it on their own.
Weight mostly comes into it when you're trying to move your bags full of loot, so your options become dropping the bags and dragging them, which is slow, but still way faster that dragging a pile of loose items. The ideal thing to have is a bag that can move itself, so, steal a car, load up the trunk, which works great as long as moving back and forth from a building to the car isn't too much of an issue.

BUT THE ULTIMATE LOOTING TOOL,

the bag with wheels,

that fits indoors...

🛒

You can build one with more storage capacity but that means
a) building it not just grabbing one
b) it'll be steel or wood so much heavier and more stamina draining to push and
c) might get stuck if you push it through grass since casters do not spread weight at all