Other folks have mentioned several other reasons, I'll just mention screen tech. My first monitor (bought in '93) was a 640x480 pixel 13" CRT screen. (And that was expensive - the Mac Classic had 512 × 342 mono, pretty comparable to the Apple Watch.)
Doing a lot of reading on that was rough on the eyes and you were scrolling constantly. I printed a lot back then.
Doing a lot of reading on that was rough on the eyes and you were scrolling constantly. I printed a lot back then.