Wow, I'm really glad someone can echo my thoughts too. Actually, back in 2021, I proposed building a software ecosystem for E Ink displays. The article is right here: [https://jackscogito.blogspot.com/2022/05/the-necessity-of-es...] (This article was rewritten in English in 2022.) And some of your design principles resonate with mine, but yours are more concise and clearly highlight the characteristics of E Ink displays.

Also, your newspaper demo looks fantastic. I think it would be perfect for viewing on a 25.1-inch E Ink display in portrait mode; the effect must be excellent. However, I'm concerned you might encounter difficulties applying Eink Mode to it, as I'm currently grappling with the pagination algorithms for Table, grid, and flex layouts, which are proving quite challenging.