There were generic VESA SVGA drivers towards the end of the MS-DOS era.

Sound blaster(16) also came close to being standard enough that games could just support that.

Extrapolating I think MS-DOS was on a nice trajectory to having complete enough (and reasonably simple and non-bloated!) APIs for everything important, when it was killed off. Late MS-DOS 32-bit games were usually trivial to install and run.