How the heck did you back up?I had a 2007? Dodge Dakota 2WD with a locked rear. Standard v/6.
Had no issues on a slick boat launch, in winter I put a section of telephone pole behind rear wheels, studded snows. Had no issues getting where I needed to go. Never tried in anything above about 8" of snow.
For my use, it did fine. I do know we used to go off roading in my 73 bronco, mud plains, in 2WD and didn't get stuck as often as you would think. Always went with friends...
You're right. Weight can make a big difference. Even in my 4WDs, that's one of several reasons why I tend to keep my snowsled in the back.
Other reasons are in case the truck breaks down; as an auxiliary fuel tank; and of course, if I need to go someplace that isn't plowed or lacks a road.