It was sorta required by IBM PC compatibles, but is not required by UEFI which supports serial console (or other interfaces). IBM PC assumed existence of graph

It was sorta required by IBM PC compatibles, but is not required by UEFI which supports serial console (or other interfaces). IBM PC assumed existence of graphic output and sometimes Option ROMs did really too crazy things with it, I still have shivers when I hear "intel raid card" because of that one with possibly Win3.x in ROM...