I haven't done it yet myself, but I've read it's fairly easy to install KOReader on the Remarkable 2 to provide a better ereader experience. Though when using this software, you wouldn't be able to mark up the text or add notes in the 'remarkable' way.
It is indeed easy and very worth it. The rm2 is the _best_ way to read text books and comics I've ever seen (using koreader), and separately it's great for taking notes. Those two uses don't really overlap for me so it's fine that they're in separate OSes, especially because it's one gesture to switch between them.
The one and only thing that really bothers me about the device is the storage is pretty small. It's fine for books, but not great for comics, you end up having to swap out old ones instead of just having your whole library available.
I tried this and promptly bricked it, although in a more recoverable way than the OP. It’s not hard to do it right (I’d got some version of a dependency wrong) but there seem to be few guardrails. I just convert epubs to pdfs now for rm2 reading
