Mutability is change without chronology, which isn't the way the real world works. Immutability over time is a more accurate abstraction of physical processes,

Mutability is change without chronology, which isn't the way the real world works. Immutability over time is a more accurate abstraction of physical processes, particularly when you get into smaller time increments and services distributed over larger distances. Mutability is useful as an optimisation, but I don't think it has much worth as a model.