I think ReMarkable is wasting a TON of potential at their price/form factor/ux. A device can be powerful without sacrificing simplicity and singularity of purpose.
The API hacking scene is very much dead. Most API implementations have been unmaintained for years now and no longer work. It's a real shame.
RSS or Pocket client?
But no, nothing, just the subscription stuff. So it's a no from me.
RSS is actually one of my favourite uses for the tablet; I built a little service that builds a pdf "newspaper" twice daily and sends it to Google Drive. Very nice to read my feeds on the rM2 instead of a glowing screen