how much of this info has been subsumed by standardized uefi?

presumably nothing because its about old devices which dont have UEFI. that being said, i suppose you mean BIOS interrupts are silly and you dont really want to know about them these days. that's true. (theres more than bios stuff in this list tho).

for ppl looking to discover BIOS interrupts and their meanings in this list, follow the breadcrumb given and go and checkout EDK2.