I had that exact same model 15 years ago. It got stolen and I’m still not over it. I got basic Kobo readers instead; they work fine with Calibre and any ebook you can get. I don’t touch Amazon with a ten-foot pole, and I never use the Kobo account you have to create when buying the device.
But I’d give somebody’s left arm to have the Sony back. It was perfect.
Where I’m from, the hyperbole would go “You’ll get punched.”