My Kindle is a dedicated use device. I don't do anything but read on it. For me, an SD card is superfluous in the Kindle.
My cell phone is a multipurpose device and I will not have one without having an SD card for extended storage unless there is simply no option. I also prefer a replaceable battery too. Fortunately, I have options in that category and you will have to pry my Android phone from my cold, dead fingers.
