Amazon’s last-gen Kindle Paperwhite is 30 percent off

Calling something “last-gen” usually means it comes with big compromises compared to the latest version. That’s not as true for the last-gen Kindle Paperwhite as it is with some other tech. The newer version can open books 30 percent faster (not the same as page-turning speed), and its aluminum design is a millimeter thinner — but it costs $50 more....