Gregory's Server
Similar to Apple, Kindle's software has always been proprietary... [I]f you buy a Kindle today, you have very little hope of actually being able to customize it without resorting to "breaking in" through hardware modification. Read more: https://u.fsf.org/3zi
@fsf I have been looking at koreader for some time. I have several versions of Kindle, and I believe this would increase the functionality of the Kindle by many times. I also view pdf files for electronic schematics which can create an issue for the Kindle.