Ah yes, the Henry Ford of user choices.

"Any customer can have a car painted any color that he wants so long as it is black".

-Henry Ford, My Life and Work (1922)

Te be honest, the most unreasonable part wasn't choosing a single colour, it was choosing black over grey.

The better to hide the oil... those early cars were very messy.

But not so much the bird shit from needing to park in the shade.

I believe it was a limitation of paint technology at the time. Colored paints took more skill and time to apply than black. Additionally, the color would chip and deteriorate in a short amount of time.

iOS <> MacOS