[gsnedders]

> This would prevent open/free components insofar as the actual driver, but would not permit the operating system itself from being installed.

If the SDR has a microcontroller, you potentially only need the firmware of the microcontroller to be signed (with the microcontroller checking the signature), and can have a fully free driver around it. You can even release the source of the firmware (and allow reproducible builds!) because it's guaranteed by the signature, not by the availability of the source.

[lexicalscope]

Good call - similar to how you load firmware for Wifi using a blob a lot of the time. But for a lot of advocates of this they still might not be okay with this as they don't want any blobs. Which I can get, but even more reason it's kind of alarmist in my view.