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Amazon: Older Kindles can no longer download e-books
(www.heise.de)
This is a most excellent place for technology news and articles.
it is definitely too closed down, haven't had those other experiences though, I've had my ReMarkable 2 for quite a few years now. Then again, I haven't tried hacking at it
The hardware weakness is super obvious if you try to add any third party apps. Slow loading times, badly exposed pen API, among other things.
in their defense, it is marketed as a device that's limited on purpose, though