I got a ReMarkable2 and the default setting of it makes it unusable for me: You MUST connect to the cloud to have hand-writing recognition. It's not pre-installed, it's not a download you do once through the cloud shit, your writing goes to a third party. Connecting the device to a computer only recharges the battery, you CANNOT transfer files that way! Here is how they want you to transfer files: You upload the files to the cloud and then copy them from the cloud to your device. The cloud service requires some app thingie not available on Linux.
There are some interesting projects on github though and you can mod the thing. I'm worried about bricking the device (OTOH, its default state practically amounts to bricked state for me).