[IncRnd]

> The 320x200 image was stretched to fit the entire 4:3 screen, to something close to 320x240.

Not necessarily close to 320x240. Linearly addressable mode X was 320x240.

[Narishma]

Very few games bothered with mode X. Most used the much easier to program mode 13h.

[IncRnd]

Unchained made int 13h easier than regular int 13h, but what about mode x was much more difficult to program? You got a faster display, square 4:3 pixels, and double buffering in 256 colors.