As noted in https://docs.python.org/3/reference/datamodel.html?#creating-the-class-object, implementing PEP 487 required the introduction of __classcell__ as a way for __build_class__ to pass the zero-arg super() cell object through to type.__new__.

Now that Python 3.7+ offers context variables, we may be able to design a more robust (and better hidden) alternative which stashes the "current zero-arg super cell object" in a context variable, allowing type.__new__ to retrieve it when needed, without having to pass it through the class body execution namespace.