We don't know if Apple was already developing this before the November kerfuffle. It doesn't look good, even if Apple has been working on it for 3 years.
But again, because for some reason I had to say this last time too:
DEATHS?
Can we avoid obviously hyperbolic statements? I seriously doubt they could ever prove that.
Did you read the article? Link between sleep / blue light and cancer rates. When dealing with billions of people, small forces can cause big numbers...
Clearly the HN hive-mind agrees with you that I'm being to hyperbolic, but downvotes aside I think there's a strong argument that this is so easy that even a very minor health benefit would mandate adding it to every device everywhere.
But again, because for some reason I had to say this last time too:
DEATHS?
Can we avoid obviously hyperbolic statements? I seriously doubt they could ever prove that.