I’m looking at this on a smartphone screen. The design and fonts are way nicer than HN (which is unimaginative and ugly in comparison). But the fonts on your site are also small and the link/buttons (for collapsing comments) are small and difficult to tap or click, just like on HN.
It would be great if you could build on this, make it more accessible and get it to work for replying, voting, flagging, etc. I like how the main comments are separated as cards.
With more third party efforts like this, maybe one day YC can be shamed into making HN look better and more accessible.