This is why we wouldn't make the same mistake, of releasing a proprietary
BIOS, again.
Are you aware that coreboot integrates the so-called "Firmware Support
Package"? The Libreboot FAQ says that "the proprietary FSP blob cannot be
trusted at all": https://libreboot.org/faq.html#fsp
Coreboot distributes proprietary microcode too:
https://libreboot.org/faq.html#microcode
And, then, there is the Management Engine...
You basically cannot get both performance and freedom with Intel. In my
humble opinion, it would be better to be honest about the compromises made in
terms of freedom to get performances.