Everyone glosses over the fact that all of these "open" radios are dependent on very much closed "source" and often expensive hardware. The RF signal chains, whether ZIF or Direct, are by far the hardest part to design and manufacture. I would love to see some truly open source hardware (that's not RTL-based; that's basically just software that happens to be compile-able into logic gates). I think it's going to take at least another generation before the semiconductor industry evolves beyond the intense secrecy.

There's certainly an argument to be made that for a case like this, the hardware being open matters a lot less, but I really think the global community would benefit from more transparent and shared Analog/RF circuit design.