Oddbean new post about login | logout Here's the newer Kindle. My Kindle also has a browser. https://youtu.be/j1ESYDWh5mA?feature=shared
I'm pretty sure Onyx Boox runs straight Android. The Supernote /may/ also be on Android, i know their future releases intend to dual boot linux.
The Fiatjaf example was on a ReMarkable.
do you have a link to that?