They don't have an app store but they have quietly released an SDK, so maybe that will happen at some point: https://developer.remarkable.com/documentation/sdk

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

There is one: https://github.com/toltec-dev/toltec/

Its development kinda stalled, with several PRs stuck at 90% completion.

I'm using reMarkable 2 as an e-book reader, using KoReader. It's almost perfect for me, the only thing that I'm missing is Bluetooth. And its WiFi is sometimes a bit flakey.

We do. The Toltec repos have tons of packages, including the Entware repos, which is what (used to) back OpenWRT devices.

There's also a UI frontend for the package manager in beta.

An RSS client without a web browser, which the team is fervently opposed to?

I remember having run netsurf from toltec.

Netsurf isn't fun on many websites but it should be enough for rendering HTML content from RSS, no? Terminal emulators and lynx/elinks/links/w3c work, too. And terminal RSS readers. HTML rendering is also possible with KOreader which runs well on rM2, come to think about it.

Here is the repo for netsurf https://github.com/alex0809/netsurf-reMarkable

…yes? I like RSS clients because they're not web browsers.