I have an old first gen Kindle PW that I jailbroke and had to fall back to after I dropped my more recent model (oops!)
On a lark I decided to put KOReader on the thing, and darn it, I wish I’d done it sooner. Setting aside all the fancy config settings, wireless Calibre connectivity is just crazy convenient. Should’ve done it sooner!
It goes to show how open devices can be better and have greater longevity. But, you know. Amazon.