Incidentally, I should have mentioned in my original announcement:
pip 20.3 turned the new resolver on by default for Python 3 users. When
users use pip 20.3 in a Python 2 environment, the old dependency
resolver is still the default. (Further discussion:
https://github.com/pypa/pip/issues/919
> ## What to expect in 20.1
>
> We aim to release pip 20.1 in January 2021, per our [usual release
> cadence](
> https://pip.pypa.io/en/latest/development/release-process/#release-cadence).
>
> You can expect:
>
> * Removal of [Python
> 2.7](
> https://pip.pypa.io/en/latest/development/release-proc
