The plan, long ago, when it was still linuxbios, was that linux would be the basis of interaction. Back then we were booting linux out of flash faster than any known bios would put up a screen. We had tools (rdcmos etc.) to manipulate cmos. We even had commands to control overclocking from linux.
So the interaction path was the linux shell.
Then the bloat monster hit and the idea of linux as the firmware died.
ron