According to Wu, the Bitcoin developer mailing list and its nearly ten-year history have been removed from the Linux Foundation. The Linux Foundation will stop supporting the list at the end of 2023.
The Bitcoin Core Development Team has moved it to Google Groups. Developer Bryan Bishop has uploaded the history to Google Groups to preserve some archives.
Email was once the main channel for Bitcoin development discussions, but as communication technology has evolved, many developers have turned to multi-channel platforms such as instant messaging, social media, and private servers to communicate.