I full get what your both saying here but there is still a cost to shifting it about. We’ve only one tractor so that means pulling the tractor from the wagon and rehitching. Add in the extra waste maybe minimal but still there. Extra straw usage as they’re loose housed. All costs to factor in
If you're worried about upsetting the tractor driver because he has to get off the seat to unhitch the mixer wagon I think you're looking at this all wrong.