> Guido van Rossum <guido@python.org> added the comment:
>
> This is runtime behavior, mypy doesn't care either way. It triggers on the
> presence of the decorator, not on what attributes it sets at runtime on the
> object.
>
>

But it's only motivation is static hinting.
My point is, is cached_property important static hint?
For example, do you want support cached_property in mypy Protocol with same
semantics?