I think, these Strings can get removed, because the ISO is bootable on x86_64 anyway, and if that machine actually dont have UEFI, its wrong anyway.
So, a mechanism would be needed, to detect if actualy bios or uefi, or entirely remove it.
(these project is focused to newerish* Hardware anyway)
Same Topic, different Place: Fallback or nomodeset. 99% only for ancient GPUs. Would call it Legacy Hardware.
Removed Copytoram, because right now dont work anyway (and if needed nowadays, is whole other topic).