python3 readiness: Stick with only considering py3 as default when writing code, not caring about refactoring existing code for the purpose of being Py3 pedantic. Write Py3-only code on master, and eventually make the backport py2-compatible on stable branches if needed. dropping paste: Need an operator ML post: is anybody using this? aarents (OVH?) said they are using paste.ini to insert middlewares. So we cannot simply drop paste. improved contributor documentation: we have PTL doc in tree [2]. Work on the CONTRIBUTING.rst [3]. [1] https://etherpad.openstack.org/p/nova-shanghai-ptg [2] https://docs.openstack.org/nova/latest/contributor/ptl-guide.html [3] https://review.opendev.org/#/c/640970/