I mean I agree with all what you guys are saying, I definitely pushed carts down the mountain full of silver, and yes you can swim with them, but the basic dragging through the meadows when you built a road and tried to make it a gentle slope is so painful to watch, like a tiny pebble and full speed running will not make it move. it definitely would benefit from being hitched to a boar. if only stone roads had a benefit, honestly it would just be fine like half load without but full load with a stone road.
it just feels half implemented today when it has been in the game since day 1