I only keep a handful of books on my Kindle at any given time, and I don’t even want any collections set up on it. The only thing I wanted from the cloud collections was the ability to view my library by browsing collections in order to quickly find a book I wanted so I could then download it to my Oasis. Obviously that isn't going to happen. I guess I’ll have to pull out my iPhone XR or my iPad Pro to locate a book, then send it to my Oasis. I prefer simplicity. I want to easily download from the cloud, I want Whispersync to keep track of where I’m at in all my books and my highlights and notes therein on all my devices, and that is about all I want. I don’t won’t to mess with sideloading, using calibre, deDRMing, etc. At my age life is too short to mess with all of that. I would rather read a book than spend a lot of time maintaining a calibre library or modifying books, etc. I did that when I was younger, but I have no desire to mess with all that any more!