The latest generation, Kindle Paperwhite, Kindle Scribe 2, Kindle Scribe 1, and Kindle and the upcoming Kindle Colorsoft, all have something in common. When you plug them into USB into your PC or MAC, they no longer appear as external drives. This prevents users from using file managers to back up their books or to sideload new books onto the Kindle. Amazon has also removed the download and transfer via USB option for purchased ebooks from the content page. This will likely prevent people from stripping the DRM from the books and sharing them on piracy websites. This is not
Seems like they don’t work exactly the same as they used to, as they now use MTP instead of USB mass storage, but while annoying, it’s generally a pretty trivial fix and your OS may already use MTP devices with no trouble. It seems there may be some other knock-on effects with fonts not sideloading right and needing a Calibre plugin to make pagination work how it used to.
So yeah, it’s getting worse, but Amazon hasn’t figured out how to bring the hammer down yet.