A lot of the Amish and Mennonites here still use them. Most of them don't have tractors with loaders, so they can't use the trenches. I can remember when there was a lot of corn here that was chopped for silage. Not so much anymore.
We use to chop sweet corn when it got little too old to eat, but we planted more than we could ever use. Then cut alfalfa and put in layers with the corn in the silo. We would mow the alfalfa, rake it that day then bale the next morning. Take it right to the chopper.Those green alfalfa bales were heavy and two boys had a hard time throwing them on the wagon
We never had a loader. We wheelbarrowed it from the upright silo to the alley way between the stanchions.When we had to go to the trench silo, that meant pulling the wagon to the trench, shoveling it on and , hauling it to the barn, and then wheelbarrowing it in. Twice a day in the snow got old real quick.Especially when we had to do it and the milking before school.
It sure made good milk and I think the cows were drunk all winter