Is the Kindle dying? A cursory check suggests otherwise. Checking the sources on the "Sales" section of Wikipedia, they sold $5bn of devices in 2014 [0], and then hit a decade-long high in 2024 [1]. Now that's much to go on, and could easily have been worded carefully to imply things that aren't true. But at worst it seems like Kindle sales are doing fine. At a ballpark of $200/device, and assuming 2024 is as low as 2014, that means they sold a ballpark of 25 million devices in 2024. The percent of people reading ebooks annually is also increasing [2] (albeit slowly; arguably it's actually flat, but that's still not dying).

https://en.wikipedia.org/wiki/Amazon_Kindle#Sales

[0] https://allthingsd.com/20130812/amazon-to-sell-4-5-billion-w...

[1] https://tech.yahoo.com/phones/articles/amazon-unveils-kindle...

[2] https://www.pewresearch.org/short-reads/2022/01/06/three-in-...

Edit: also MSRP on ebooks is lower than for print versions (very roughly 50%, based on a couple randomly checked books)