Definitely glad to see this post making the rounds again - I think it's a pretty important concept. Kinda wish the OP was a bit more concise but otherwise good.
That website has truly horrifying typography and design. I didn't succeed in reading all the way through it because of that. Didn't upvote or downvote, but figured I would let you know.
There is a checkbox at top right labelled "Readability"; clicking it changes the style into something it's actually possible to read.
After doing that it did turn out to be a great post. Thanks for the tip!
It's not my work. I only read it and found it enjoyable.