You would think that a web page about fonts would at least make a halfhearted attempt to use fonts that are somewhat readable.

I know we're not supposed to nitpick about formatting details and instead comment on the message itself. But when a page is about fonts, I think its choice of fonts is fair game. :-)

I tried to read the page in Chrome and Firefox on my Galaxy Note 4, and on desktop Chrome and Edge. It's barely readable in any of them.

Combine the spindly thin body font with the layout that doesn't reflow on mobile when you try to zoom in - what a mess.

The article would be so much more readable if it just didn't use a custom font at all and simply let the browser use its default font.