[dnquark]

What really matters is not how "open" the device is, but the open-ness of its data format, which is where rM epically fails.

It doesn't matter if a gadget is hackable if it locks you into a proprietary file format and doesn't have good interoperability. Exporting PDFs just doesn't cut it; the point of keeping your notes digital is being able to (a) maintain them as living documents and (b) use them on hardware of your choice.

Buying an Android-based device like Onyx Note Air gives you an option to use apps like Xournal/Xournal++ (best-in-class for handwritten notes, but unfortunately still in alpha on the mobile), or Stylus Labs' Write. This means that your notes are available, in their original form, on virtually any platform, in an open format. This is way, way more important than being able to root or ssh your gadget du jour.

[siraben]

You might be interested in the reverse engineering efforts[0] for the proprietary file format and the C++ library[1].

[0] https://remarkablewiki.com/tech/filesystem#lines_file_format

[1] https://github.com/ax3l/lines-are-beautiful

[diggan]

Might be different for different people but I sure prefer a "open device using a proprietary file format" over "proprietary device using a open file format" as the former allows me to change everything regarding the device, even what file format it uses. So I can continue using the proprietary file format or change it to a open one with a different reader/writer, but same hardware.

"proprietary device using open file format" would make me be stuck with whatever format they decided to use, and stuck with the same reader/writer. This is less helpful to me than being able to change everything in the device.

[Evidlo]

The notebook storage format is well understood, now. There are multiple libraries for parsing/exporting/syncing.