Puzzled (again). Probably old age.....
This article is about the BIOS software on a motherboard.
*
Surely most people want to preserve some functionality defined at THE APPLICATION LEVEL. If this is true, then old CP/M applications (say 1970s and early 1980s) can be run pretty fast on emulators on modern machines. DOS applications have similar emulators on modern machines. Even here at Fedora Mansions there are WIN31 applications running perfectly well using WINE on cheap modern laptops. (Note that this last example has 16-bit application software from 1992 running perfectly well on a newish x86-64 machine running the latest Linux kernel.)
*
So can someone explain why there needs to be any concern about obsolete BIOS software for obsolete hardware?