> Again: this is a good thing. They aren't shipping proprietary firmware.
Purism is shipping proprietary hardware and proprietary firmware with the device. They're leaving it non-updated without fixes for known, verifiable vulnerabilities both due to the end-of-life components and lack of OS updates for it. Not updating it doesn't mean there isn't proprietary firmware. It's still there. They blocked updating some of the firmware, not all of it, but they don't update it.