[omegote]

Good luck reading an article with lines that span the entire 2560px of the width of my screen.

[hrnnnnnn]

Firefox reader view to the rescue https://support.mozilla.org/en-US/kb/firefox-reader-view-clu...

[CRConrad]

1) Reader Mode

2) Most OSes nowadays have resizable windows. Drag the borders of your browser window in from the edges of your screen.

3) One of the few advantages of reading HN (and therefore the sites it links to) on a phone.