I think that some of our human nature is mutable, but changing it is a very long-term project.
But the created exemplar is even more mutable than the soul.
Virgo is an earth sign, but her quadruplicity is mutable.
Taurus' stable condition can be a boon in such a highly mutable world, but naturally, every good point is matched by its negative potential.
Some models are not mutable, so a transfer operation of COPY only should be advertised in that case.