It's selling point is a lack of features. There's no web browser, no Instagram, no Facebook or Slack. No messaging. Just a digital piece of paper. No distractions. If you give me a way to get reddit on there, the device is ruined.
[1] s/Keyboard/Touch Screen/
The analogy, in this case, would be replacing NON-nutritious ingredients with water or air.
It doesn't support non-Latin languages, not even having a keyboard for them. Its handwriting recognition barely works, and it lacks a good system to organize notes.
The hardware is awesome, but their software is terrible.