If you’re into Computer Modern, almost all modern tech variants (not Knuths original) are too light in print. If you look at his printed books from back in the day the letters are thicker. It’s just a consequence of using one technology instead of the printing tech the font was designed for. Same thing (but more extreme) happened to Centaur btw.
Check out the pictures of CM here: https://www.levien.com/type/cmr/gain.html