The miller operates the mill to provide his value. What does the landlord do? The miller isn't merely holding a millstone captive, he (or another miller) is re

The miller operates the mill to provide his value. What does the landlord do? The miller isn't merely holding a millstone captive, he (or another miller) is required to operate it. If the miller dies, someone else has to operate the mill. What happens when a landlord dies? What meaningfully changes?