I am in full support of using shopping carts and box carts as “vehicles” to transport small amounts of cargo. NEO Scavenger does this as well and it’s a rather viable addition for any phase of gameplay.
I’d also suggest that they be silent in terms of aggression mechanics, but still make the classic clangy wheel sound of a cart to players in a 20m radius.
A couple of cart types I think could also be added:
Luggage Cart - has less capacity than the box cart but at a lower movement penalty, in addition to being more durable thanks to frame construction. Found uncommonly in tourist related areas. Can also hang bags very easily. The flat bed makes it possible to place a couple of storage buildables potentially, such as lockers.
Airport Cart - a super small version of the box cart. Why would you use this? Because it can fit in very tight spaces and is easily concealed. It’s also the easiest to maneuver vs all other carts. Very common in airports.
