Two things have substantially changed: CRTs don't emit that daylight-like blue spectrum. There is a diagram further down in the long article showing the diffe

Two things have substantially changed: CRTs don't emit that daylight-like blue spectrum. There is a diagram further down in the long article showing the different impact of different light sources on sleep. Additionally, not mentioned in the article, social network streams are deliberately constructed to increase your online time, by being 'interesting'. https://www.ted.com/talks/nir_eyal_what_makes_technology_so_habit_forming/up-next https://www.ted.com/talks/nir_eyal_what_makes_technology_so_...