I really miss my old, old Kindle keyboard. It was the perfect form-factor for reading fiction, and the physical page turn buttons on both sides were literally perfect - holding the Kindle in either hand, the page forward button is in exactly the spot where my thumb wants it to be.
When the last of my old Kindles with the physical buttons died, I broke down and bought an Oasis, and... it's wildly better than a modern Paperwhite or a Kindle Fire, but it's pretty shittily designed from a usability perspective. The whole thing should be as thick as the offset thick edge, in order to hold it comfortably, and while it is nice to have physical turn buttons back, they're really awkwardly placed to use if you're trying to hold the thing in one hand and use your thumb, as one does with a Kindle.
When the last of my old Kindles with the physical buttons died, I broke down and bought an Oasis, and... it's wildly better than a modern Paperwhite or a Kindle Fire, but it's pretty shittily designed from a usability perspective. The whole thing should be as thick as the offset thick edge, in order to hold it comfortably, and while it is nice to have physical turn buttons back, they're really awkwardly placed to use if you're trying to hold the thing in one hand and use your thumb, as one does with a Kindle.