Honest question, why did you buy 10 kindle devices in 10 years?
You can also sell them back to Amazon for a pretty good bonus when it’s time to upgrade. I think I sent back an old paperwhite and got $50 + 20% off my Scribe.
Right now I have an Oasis and a Scribe that I use about equally.
Reading is one of my bigger hobbies, I read around 100 books a year on Kindle.