Who said anything about a low res backlit screen? And if you read monitors and screens all day, it may be an issue, but with dark mode reading it is fine. The devices I am talking about have about twice the PPI as a 22/24 inch 1080p monitor. There are cheap e-readers that have atrocious resolutions but the tablets I am talking about are fine, but not as good as EInk.
Let me guess… its a laptop isn’t it?