4.0 feels actively evil in intent and execution. It's practically unusable. The kindle reader app is already garbage for books, but its aggresively hostile for comics. And now not only does it alienate non-US customers, but ir rejoices in telling you it sucks for you they no longer support your country: "Go buy stuff in a different app, and come back to see if it shows up here, lol". There was zero reasons to do this, ZERO.