Open? In what universe? They are blatant GPL violators: https://www.reddit.com/r/linux/comments/hl09g7/onyx_boox_chi...
Compare this to the Remarkable who probably does not violate the GPL but whose software platform does not allow me to simply add more functionality.
Good example of “practically open” to “technically in the GNU sense ... bla bla bla”.
The way it looks remarkable wants to introduce a paid cloud service. Also ironically, they are very closed down in their communication.
This is such a bummer to me — I’m not going to toss my 6” Onyx but I probably won’t buy one of their other products now.