I only realized this recently but Amazon just removed the ability to download and transfer Kindle eBooks via USB. This likely does not impact most Kindle users, but this severly impacts my use of the Kindle going forward. The Download & Transfer via USB actually allowed me to keep my Kindle "airgapped", meaning I can keep my Kindle on Airplane Mode with no wifi-connectivity but still add and read ebooks. This extended to borrowed ebooks from the library and allowed me to take advantage of a neat hack where I can download the .azw ebook file and keep it stored on my Kindle indefinitely. So even when the return date passed, I could continue to read the borrowed ebook on my Kindle since it couldn't be removed as long as I kept the Kindle offline. Not having to worry about the return date allowed me to read at my own pace and reread as well. I knew this day would eventually come, but still really bummed.