The biggest problem is the screen on say a MBP is different than an X240 or an XPS13. Next time you are in a big box retailer look at them side-by-side - each screen can access a quite dramatically different contrast and color space.
So the low-contrast issue is a manifestation of the classic "works for me" bug. A "cozy" distance on one display become irritatingly illegible on another.
The biggest problem is the screen on say a MBP is different than an X240 or an XPS13. Next time you are in a big box retailer look at them side-by-side - each screen can access a quite dramatically different contrast and color space.
So the low-contrast issue is a manifestation of the classic "works for me" bug. A "cozy" distance on one display become irritatingly illegible on another.
The WCAG2 (http://www.w3.org/TR/WCAG20/) calls for a 4.5:1 ratio ... make this 7:1 or so and you are good.