Being usable and looking really cool often don't go together very well. I suppose the few cases where they do, are the mark of a truly great designer.
Superimposing the text of one comment over another may look cool, but doing so means you gave no thought to the experience of the user.
Still, maybe it's more the article writer's concepts of a unique website that don't work more than all sites being the same being a bad thing. Their redesign for Medium.com is nearly as unusable too:
https://retro-medium.netlify.com/borism
I get the creativity in letting people adjust the length of words/negativity of words/number of most common words in an article, but like the Hacker News redesign, it just creates an unreadable mess.
You can make something different without making it unusable, and most of these redesigns fail miserably at that.
The HN Redesign probably happened because the API was easy to use by students and they wanted to experiment with "cyberpunk" style interface, for which a text heavy site like HN was perfeect. It isn't at all the type of site
I can certainly imagine all websites looking like this in the near future however. Website designers all seem to love jumping on idiotic bandwagons that favor looking cool over usability.