w8 one step back.
you misunderstood me too.
i am not arguing, i not say we should switch all users to UEFI.
SeaBIOS does its job well. Pureboot probably soon too.
what i am saying is that there is an 3rd option, and maybe we should consider to publish that option too.
However, technically fact that there are ready to use configs in repo, one who is capable of compiling bios for them self, probably will be able to convert system to UEFI.
which is also an argument.
doesn’t work with a VGA BIOS either
read intel specs for SFP package you are ussing, intelvga in this cpu will simply not work with Legacy BIOS
it’s not fault of seabios, just binary blob is for uefi.
i was fighting with similar issue to make coreboot PXE working with latest intel cards. simply new firmware require efi to boot correctly.
simply chip vendors slowly drop legacy support.
that’s all,
thanks for your work. that was my initial intention. 
not arguing with you.