If you go through old Springer Undergraduate or Graduate Texts in Mathematics (typeset in TeX and Computer Modern) you'll notice they are really pleasant on the eyes. The amount of information density is just right. There's no noise and it's very easy to distinguish where sections start and end.
If you look into any great pre-TeX book like Rudin [1], it looks much uglier and more difficult to read. I'd actually pay a significant amount of money for new editions of Rudin or Halmos typeset in TeX and Computer Modern. They'd be much easier to go through.
I must also add Latin Modern is a slight update to Computer Modern that is slightly thicker and looks much better on screens.
If you look into any great pre-TeX book like Rudin [1], it looks much uglier and more difficult to read. I'd actually pay a significant amount of money for new editions of Rudin or Halmos typeset in TeX and Computer Modern. They'd be much easier to go through.
I must also add Latin Modern is a slight update to Computer Modern that is slightly thicker and looks much better on screens.
[1] https://web.math.ucsb.edu/~agboola/teaching/2021/winter/122A...