I've come to realise eink is mostly a meme, it's really cool tech and probably has some use cases but upon realising I comfortably read social media on my laptop for hours I've realised I could just do the same with books, download an epub and drag+drop to apple books (syncs progress and book with phone) then just read on whatever device I'm using, tools even exist to import highlights from books into obsidian or whatever else - most portable eink devices are laggy and janky as far as battery life goes I can't remember the last time my phone or laptop ran out of charge and if it did I wouldn't be too concerned with reading books and apple books doesn't seem to drain my iphones battery to a point of being a concern 

 GM, replying to your note on wss://nproxy.kristapsk.lv