blue_shirt
It's PDF capabilities are fine, and you can write on the pages which is nice, but I've not really tried to access any of these notes outside of the device. The did roll their own cloud sync capabilities though so you can use their apps on devices for that. There's also the 3rd party options that exist for that too.
As mentioned by jagraff they expose ssh and allow you to login as root. The whole device is a linux machine so if you want to setup syncthing to run on it you can[1]. If you want something else like zotero, or google drive, I suggest checking their wiki[2] and the github repos[3] dedicated to curating some of the stuff written for it
TLDR; Super happy with remarkable v1. So happy pre ordered V2. It gives you root on a linux box.
[1]: https://github.com/evidlo/remarkable_syncthing
Some examples of the open source stuff can be found on github [1] and their wiki[2].
[1] https://github.com/reHackable/awesome-reMarkable [2] https://remarkablewiki.com/tips/start
Edit: Found it, https://news.ycombinator.com/item?id=19152145