If I replace my 5-year-old Kindle with a new one, how do I get all my books onto the new device?

Do I have to download them all again one at a time? Is there an efficient way to retrieve all of them?

I have a Paperwhite. The interface is so clunky that you wouldn’t think anything would still work that way in the 21st century. Is the newest Paperwhite just as bad? If so, what should I get instead?

Thanks for any advice.

I still strongly prefer real paper books, for all the usual reasons, plus the relative lack of typos and OCR scanning errors. But you can’t beat an e-reader for a quick, lightweight grab on the way out the door to take someone to the emergency room or to get on a plane.