I have a Remarkable 2 that I used to use religiously, now use sporadically, but cannot recommend because of the user-hostile changes to the subscription and the very restrictive underlying software.
One of the promises that lead me to buy one was the hackability - "It's Linux!" "You can SSH into it!", which, on paper (heh) is still true, but in practice very much isn't.
I think something like a Boox, which runs Android, might be more open to customization, but for now I am back to pencil and paper. That doesn't run Linux, but it also won't change its terms of service anytime soon.
One of the promises that lead me to buy one was the hackability - "It's Linux!" "You can SSH into it!", which, on paper (heh) is still true, but in practice very much isn't.
I think something like a Boox, which runs Android, might be more open to customization, but for now I am back to pencil and paper. That doesn't run Linux, but it also won't change its terms of service anytime soon.