Debian 9 (Stretch) was released on June 17, 2017, and will reach End of Life on June 30, 2022.
At the same time, the development of Sympl 9 will be frozen, and no further changes will be made other than emergency fixes for any critical security issues with Sympl itself.
At this time we’ll also push out an update for
sympl-core which will add a banner on login reminding users that the underlying operating system has reached End of Life.
At this point, there’s no migration path from Sympl 9 to Sympl 10 or 11, and we would recommend users on this version install a clean version of Sympl on Debian 10 (Buster) or 11 (Bullseye) rather than attempting to upgrade, as there were significant background changes between Debian 9 and 10.
Development of Sympl 10 and 11 will continue, and new Sympl releases will continue to match Debian releases as closely as possible, but as always, if anyone has any questions about this, don’t hesitate to ask.