Our Dometic Refrigerator freezer compartment has three zones- the top will freeze anything hard as a rock, the next two shelves will keep frozen food solid but takes a day or so to freeze items not already frozen. The bottom shelf keeps items colder than the refrigerator but rarely will freeze anything.
So we keep ice cream at the top and it stays hard.
It does seem though that some ice cream now days doesn't seem to freeze hard even at home in a residential fridge. We currently have a 3 gallon bucket of ice cream from Kroger that has stayed soft for about two weeks so far. I experienced this with other ice creams as well (usually the cheap stuff).