@Suiseiseki @idiot Chinese/Russian/US intelligence have all been using BIOS implants since the 2000's. Here's an old school NSA TAO wiki page excerpt from ~2010 (public from Snowden docs). UEFI standardization has just made developing this stuff easier
Attackers who want this are probably more common than the rare enthusiasts that actually want to run coreboot etc, and would be way more common without those protections