A lot of computers with OLED displays use PWM for the low brightness levels, and he seems like the type of person who would be sensitive to that sort of thing.
PWM is the only useful way to drive an LED and the people who deny this are, to me, hilarious. In fact for the author's stated use case of low light conditions PWM really is the only way to do it without wrecking accuracy (and efficiency).
My no PWM laptops look fine to me for watching movies. Sure, less efficient. But if I can't look at it for more than 30 seconds without my eyes burning then what's the point?
