It's a pretty interesting approach to the website and there's some features I never would have discovered on my own, but the author's reasoning seems pretty poor. The premise being that multi-line stretches of underlined text are difficult to read, therefore link-text (typically 1-3 words) should not be underlined.

It's also quite ironic that the author's argument against ligatures in programming fonts is that the simple substitution doesn't respect semantic difference, whilst using emphasis to signify that there is a link present

...and then he decided to put his name in small caps under the ligature article, and that one isn't a link.