My brother gave me his old one, and I did read a few books on it. Mostly because it's a pain to get books in any language but Spanish in Ecuador. But then a online shop popped up, delivering any kind of book in most languages, including German if it's original, and since then I'm back to physical books. For a while, until my shelf is full. Then I'll be back to the reade, which is pretty neat.
I had a very, very old one before, lent to me by friends, a 2012 model or something like that - it was old when I got it in 2018. That was very uncomfortable. The new one is a neat design, easy to hold and with a lot more helpful functions like light.
I'm glad you're enjoying it! It's perfect for books that will not make it into the inheritance pool, but read once and forgotten after.
I have so many books I count count them, and I buy two to three more a month usually. The Kindle is about me travelling, so many work trips next year, and being able to travel light yet take many books with me. I've got almost thirty on the Kindle so far and will end up with countless more. Reference, history, instructional, fiction, non fiction...so many. I'm looking forward to that little thing making them all accessible. And yet, it won't replace physical books. I like having options.