[jankotek]

Hercules mono screen (XT) had better readibility than color CRTs (EGA and VGA). It had better resolution and refresh frequency.

[kps]

You can spend your bandwidth on colors or you can spend it on pixels.

(I recall having a 1600×1200 mono display at work circa 1990 when a high-end PC was pushing 800×600 SVGA. Beautiful and crisp, but porn^H^H^H^H the internet killed monochrome monitors.)