https://github.com/adobe-fonts/source-code-pro/ https://en.wikipedia.org/wiki/Source_Code_Pro
I have a 27'' 4K display and may upgrade to 6K or 8K soon enough (you can count how comparatively high pixel densities even budget smartphones have, on their tiny screens).
I mostly read fiction, but for the occasional programming book the Adobe's sans-serif typeface is invaluable. I don't currently use a serif font and ignore the publisher-set defaults in ebooks.