Speaking solely for myself, I really dislike apps which use dark gray and light gray instead of full black and full white (or something very close to it) in the

Speaking solely for myself, I really dislike apps which use dark gray and light gray instead of full black and full white (or something very close to it) in their "dark UI." It gets worse as you age and presbyopia sets in. It is so much easier (for me, at least) to read high contrast text than this modern trend of "gosh don't use real black and white" in the UI. Additionally, actual pixel black is very (um, perfectly) energy efficient on OLED displays like my iPhone X and Alienware 13. I like the discussion of black in art, though.