Comment by Sverigevader

It can make a huge difference in performance and batterylife, as well as how well images are rendered. I learned this by chance through this (great) site https://standardebooks.org/help/how-to-use-our-ebooks#kobo-f...

This was after a year or two of suffering through bad performance and a janky experience. Except for the purchased books of course. Somehow I never thought it was possible to fix.