I remember seeing those Thinkpad X230 mods with an eink display and how a challenge was availability of the specific discontinued e-ink screen of the right size.

The mfg from the article has a 13.3" screen that would be fun to try a mod with: https://shopkits.eink.com/en/product/detail/13.3''ePaperDisp...

and impressive 1600 x 1200 pixels