Important things to point out: 1. The vast majority of devices are LCD, which does not use less power when displaying dark images. In fact, it might increase p

Important things to point out: 1. The vast majority of devices are LCD, which does not use less power when displaying dark images. In fact, it might increase power consumption slightly. Not only are all discount devices LCD due to lower price, but OLED (as a stop-gap technology akin to plasma) has many shortcomings that lead to even premium devices not including it. 2. Average power consumption of an OLED is significantly higher than that of an LCD, due to poor efficiency of the OLED technology itself compared to standard LED backlighting of LCD's, so OLED devices do not have a power advantage. Thus, claiming that dark mode would make a difference on global power consumption is false, as it only applies to a relatively niche technology, and suggesting that the technology should be adopted to allow for this saving mechanism would be counter-productive as the technology is less efficient for average workloads. Your windows phone ran for days due to low screen/wake time (lacking apps, perhaps), not because of dark mode.