Then again, you can probably afford to buy an e-ink reader by then.

Are you going to try to tell us you're worried about GP's sight and this comment isn't just here to feel superior in some way?

The average HN user probably spends 10-100x more times / day on avg than an average Kindle user who doesn't program/develop.

when does that happen? I'm 44 and I read ebooks almost exclusively.

Eye health requires active management, whether you are using screens or paper, with or without corrective lenses. It's not a foregone conclusion.

Also eInk displays are functionally no different to reading on paper and the phenomenon of eye trouble from people who engage in a lot of close focus work pre-dates the computer age by a lot.