I want an open source firmware based around a popular rtos. Sell me the product, provide ok software gratis. Framework's AMD laptops notably have a Zephyr base

I want an open source firmware based around a popular rtos. Sell me the product, provide ok software gratis. Framework's AMD laptops notably have a Zephyr based embedded controller. Good stuff. There's definitely some strong OpenBMC efforts ongoing right now in server space. AMD says they're going to replace (closed) AGESA bring-up code with OpenSIL, so consumers might even have access to firmware it yourself too, sometime this decade.