I often code for 12+ hours straight and the only way to keep up with such a stress on eyes is to use bigger fonts and not focus too much on text (i.e. engage in a slightly defocused vision).

Which means I never use small fonts, though I see a lot of people who code on 13-15 inch screens with super tiny fonts.

Naturally, once you have to use large fonts you end up using large screens (I'm currently on 49 inch ultra-wide Samsung 32:9 screen) and it's the best setup for coding I can imagine.

Still when coding on a laptop, I sacrifice window splits and stuff like that but not the font size. So Macbook Pro resultion is even too high for me, and I'm quite happy with FullHD laptops as well.