They quit making the old ones where you had a ledge at a corner to ride on standing on it.
All power jacks since those days is carefully designed to walk behind it. So it takes more time to set a pallet here there and yonder.
When they finally banned drivers from touching power anything, I changed to hauling medicines or other high dollar goods that are unloaded by the warehouse within the hour and I stay in the tractor for the bills.
That eliminated so much lost motion and wasted effort.