For what it's worth, I really appreciate the author included an e-ink theme. I use an e-ink phone as my primary mobile device and LLMs would never implement an e-ink theme without being explicitly instructed to. For me, this is a more usable site than many.
Having said that, I would have used a 1-bit design to reduce ghosting and set up an option for pagination over scrolling; some e-ink devices handle scrolling fine but others don't.