[mdp2021]

> Watching youtube isn't a good use case for a color e-ink

You may have not thought that part of the idea is using displays for education (video is an important format for educational material nowadays) in times where Countries are noting epidemics of eye difficulties (e.g. myopia) among students.

This said, use of video (frequent refresh) on EPD is strongly inefficient - EPD is energy-optimal as bistable, and consumes a lot upon state updates. And, those EPD cells are not eternal, they have a lifespan of state switches.