An open firmware port is useful only if its hardware scope and recovery procedure match the machine. This release has meaningful progress and specific operational limits.
One board and one processor family
The July 30 announcement targets MSI PRO B850-P WIFI with Phoenix processors, including the validated Ryzen 5 8600G. Its coreboot/openSIL foundation does not make it a universal AM5 image. The reported 79.1% reduction in closed code compares firmware images; it does not mean all remaining firmware is open or eliminate AMD PSP components.
Read power and update policies separately
The release notes checked September 8 still list 0.9.0. Restoring the previous powered-off state is problematic, while always on and always off work reliably. Immediate Capsule on Disk updates are supported; staged capsules do not survive reset. Prebuilt access is through the full PC hardware/firmware bundle, rather than a standalone subscription for this board.
These distinctions change a deployment decision. An unattended machine configured to always power on is not using the same policy as a desktop expected to recover its previous state. Test the selected policy through a controlled AC interruption only after protecting unsaved work. A successful warm reboot cannot establish what happens when mains power returns.
Establish recovery before flashing
Record the exact board revision, processor and existing firmware. Identify how the original image can be restored if boot fails, and keep an independent copy of the necessary files. Source availability and a compatible prebuilt image are separate questions; neither substitutes for a recovery plan.
After installation, check the functions that matter to the actual workload: boot, storage visibility, network stability and the intended update route. We have not flashed or tested this board. The diagram separates hardware eligibility from power policy so that a supported platform is not mistaken for a guarantee about every operating condition.
September 8: clarify exact board and Phoenix support, working AC power policies, capsule limitations and restricted prebuilt availability.