Even the open firmware that does exist has some major issues (like needing a proprietary compiler) or the hardware that it can run on it checks for Intel signatures, or only exists on archive.org, or is packaged in Debian but not properly built from source code, or exists but is only useful for obscure/ancient hardware that only people who want libre firmware buys, requires a forked compiler/toolchain to build, etc. Basically, open firmware is a hard problem and there aren't a lot of people with the skills and interest in doing it. I'm trying to at least document what exists on the wiki, anyone know of more projects?

https://wiki.debian.org/Firmware/Open