Gladly!
We have the goal to create a device that does not require firmware blobs at runtime. Most (almost all) current and more recent chips require a firmware download at runtime through the operating system. This is violating RYF specifications. This is BTW also the reason why we are still pretty stuck with the ATH9k in the laptops.
The next constraint is that we need a WiFi chip / module that is as low power as possible for our mobile device. The module we have chosen now provides both, no runtime firmware and low power. For getting rid of the runtime firmware we invested significantly in a custom firmware that the manufacturer made specifically for our use case.
Cheers
nicole