I've got an older Kindle and this annoys me greatly. I don't use it a lot, maybe read one or two books a year on it. It works fine and the fact Amazon expects me to retire my perfectly good working device and hand them money for a new one is ridiculous. They are likely to lose me as a buyer of books on Kindle I will make the effort to buy more books elsewhere.
Does anyone know of a Kindle equivalent? Or has Amazon locked down the format to prevent that?