Gigawatts of electricity are used to run sophisticated neural nets, advanced data pipelines built to funnel all that data to the mother ship and thousands of dev hours went into this elaborate tracking mechanism. You need that of course, "to improve UX". I do not have a problem with that for such a device, per se. Fair enough, go real overkill on your "user research" then.
And yet, so many UX aspect of a Kindle are just plain bad. Problems which have varying degrees of complexity, to be fair. But some of them are so trivial yet impactful that it is hard to imagine they would escape the attention of a single UX engineer worth his salt looking at a Kindle for two days. Some examples:
* I have a cheap Kindle, which means the lockscreen shows ads. They are so hilariously anti-personalized I can't even. Like, you have all this Big Data and you think I will ever buy a run-of-the-mill cliche romance?
* The recommendation system itself. When you "start out" on your Kindle, your recommendations are literally just every single other book the few authors you read have ever written.
* Having airplane mode off seems to drain the battery massively even if I am not connected to WiFi/Bluetooth nor actively attempting to
* One can view interesting usage statistics, but only if you declare yourself as your own child and activate a password based content lock
* I have to manually flip through sometimes dozens of pages of imprint, one-line-per-page copyright notices and so on until the Kindle realizes I have indeed "read" the book so it stops displaying it at the top at "99% progress"
What I want to say: Do all the Edge AI and IOT and Orwellian Surveillance for all I care. But maybe fix the boring old low hanging fruits first?