Remarkable claim their device is a 'paper tablet' rather than an e-reader. Nevertheless, Remarkable also highlights that the 'paper tablet' is equally made for reading too:
In our endeavour of creating a tablet for reading, writing and sketching, we have tried almost all types of tablets and display technologies.
It is here - the reading side - that Remarkable falls short as the e-reader software misses basic features that significantly cripples its use.
On the other hand, Onyx Boox has the best e-reading software. What is lacking with Onyx Boox e-readers is its note-taking capabilities. The screen of Boox's e-readers, like other e-readers, has a smooth finish that feels unnatural when writing and feels closer to writing on a tablet screen. Added to the slick glass surface, in the case of both the Note 2 and Nova 2, there is a slight gap between the glass layer and E-Ink display.
Despite being inferior to Remarkable, Onyx Boox's e-readers are still usable for note-taking. It just doesn't have the paper feel and latency that you get with the Remarkable 2. Still, the software for note-taking is capable, and you don't get significant trade-offs between reading and writing (Remarkable 1 and 2 are optimised for note-taking but have significant reading drawbacks).
What is needed is a device that is optimised for both note-taking and reading. I think Remarkable is closest to getting it done as the Remarkable 2's limitations are software related.