It's possible that a single-purpose firmware is too few stages, and it's also possible that the current acpi->firmware->uefi->grub->initrd->linux is too many st

It's possible that a single-purpose firmware is too few stages, and it's also possible that the current acpi->firmware->uefi->grub->initrd->linux is too many stages. UEFI does have many of the features of a full operating system including shell, multiprocessing, networking and it really should be Linux in this position instead. LinuxBoot is another attempt at reducing layers here.