Using nonguix also means you can't expect support in official support channels. Just something to know before you start.
If this is true, it is a deal breaker for me. I try to buy open source hardware when I can, but even systems like the Pinebook Pro will have their functionality significantly limited by the absence of the linux-firmware package. It is a simple fact that most common WiFi chipset require non-free firmware.
That's not true. You get support for the part of the guix system that is free software from guix, and support for what comes from nonguix, from nonguix. So if you have issues with the proprietary driver, you talk about it on #nonguix, but if you have troubles with guix, you talk about it on official channels like #guix.
If this is true, it is a deal breaker for me. I try to buy open source hardware when I can, but even systems like the Pinebook Pro will have their functionality significantly limited by the absence of the linux-firmware package. It is a simple fact that most common WiFi chipset require non-free firmware.