Where did white keyboards go?

I have noticed a new trend of black keyboards about a decade ago. It was weird and I didn't care for it. But now, I am having big troubles finding white keyboards in general. Usually it is less than 10% of the offering in majority of stores.

So it makes me wonder, why is this happening? I believe that black keyboards are ergonomically bad from the contrast point of view so I am having hard time accepting this as a reasoning.

(and the lack of iso 105 layout keyboards is also an interesting topic for another day)