@Cyrillic @dushman @druid @mischievoustomato It might be possible, not that it really matters, because his stubborn head cannot understand that every x86 CPU since first Pentium Pros run proprietary code by default burned into the die and always will no matter how hard you try.

Hardware made after the 70's cannot be fully trusted anyway, so by replacing the bootstrap code, you are entering the area of diminishing returns where other much more easier privacy and security measures have a much bigger impact.