I have had several Kindles, a couple of the Kindle Fire, and one of the Paperwhite Kindles, which I didn’t like at all. Actually, I prefer reading on my iPad mini, which is just in between the 7 inch Kindle and the 8 inch Kindle Fire, and I find it much simpler to order books and to change books when I have finished reading one.
I read a lot, so I have Kindle Unlimited, which gives me access to borrowing a huge amount of books. Most of the time, if I am reading a novel, I do not need to keep it afterwards anyway; so I only buy books that i want to keep around and refer back to.
I even get the kindle books for knitting and crochet, as well as health books and cookbooks, and those , I usually buy so that I can re-use them .
I also subscribe to BookGorilla.com and Bookbub.com, and they have free and discounted books every day; so often I can get books that i do want to keep when they are on sale.