Current summary of the situation, as I understand it:
Documentation on the Responsibilities of a Core Developer make mention of discuss.python.org replacing much of the older mailing lists, but does not make clear what the expectations/responsibilities of the Core Developers or those who need to reach them are around announcements or critical notifications, nor does the documentation around Following Python’s development.
This seems to have created a schism in expectations of some Core Developers around how and where they will be notified of important things like Steering Council Election cycles, and a gap for people in roles who need to make that contact in knowing what the right method is.