It's a matter of practice. I find light backgrounds unbearable in thr nails on chalkboards sense. After looking at one the rest of the environment looks dark an

It's a matter of practice. I find light backgrounds unbearable in thr nails on chalkboards sense. After looking at one the rest of the environment looks dark and off. I can't make the backlight dim enough for them to be comfortable. With dark backgrounds and light text, I feel the device to be a more natural part of the surroundings. It's not glowing nearly as much and is emitting only the light that's needed to communicate the information I need. If you are talking about research based on modern oled devices then I'd love to read it. Maybe I'm weird.