Honest question, why did you buy 10 kindle devices in 10 years?
I like to upgrade them (the battery life, screen, refresh rate, etc. have all gotten consistently better over the years), I usually have one to leave at work and one for home use, and I give the hand-me-downs to friends and family.
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.
I have never once been like, "You know what this eink device needs? Color!"
I get that it might be a draw for some people but this just isn't appealing to me and I can't see the mass market use case for color besides color being neat.