I just did this the other day too. Like other commentors have stated: it doesn't fully de-Amazon your kindle unfortunately. Still great, but one thing that bugged me for example was that even after jailbreaking I couldn't set custom screensavers without paying the $20 to turn off "special offers" mode.
Right to Repair
Whether it be electronics, automobiles or medical equipment, the manufacturers should not be able to horde “oem” parts, render your stuff useless if you repair it with aftermarket parts, or hide schematics of their products.
Summary video by Marques Brownlee
Great channel covering and advocating right to repair, Lewis Rossman
My kindle has long been jailbroken, unfortunately there doesn't seem to be a way to completely de-amazon it. The device will still always boot to the default kindle interface, KoReader needs to be launched manually. I can't imagine amazon not having a possible way to "blacklist" the KUAL applet or something.
Can't you just block if from connecting to the internet at the level of your router?
I could (a lot of users might not have such an option in their router), but that would mean I wouldn't be able to use some of the features of koreader, either. I could blacklist the urls individually, but I don't know if there is a list of relevant urls
Is there a way to block Kindles from updating automatically?
There is a tool that renames the OTA binaries. But there were reported instances in the past, where updates would still get installed.
Its a bit murky, because you can find conflicting info about this.
Wow, Thanks!!
FYI this doesn't work on the most recent Kindle update, 5.18.1