Proxmox VE 8 hits end of support: plan the VE 9 migration as two windows, not one weekend
The Proxmox VE 8 branch, released in June 2023 on Debian 12, reaches end of life in August 2026: hypervisor patches stop even though Debian LTS continues. For anyone running Ceph or old containers, the VE 9 upgrade is two separate projects — and a rollback that goes through restore, not reverse migration.