Even with the limited amount of usability, the community has already made some amazing additions, for example KOReader. Imagine how far we'd get if we can just write any app we want for reMarkable. I would completely get a typefolio and ditch my laptop if I have the ability to *easily* write my own app on the reMarkable without going through the loops of binary patching and other quirks.
The rest has been released a few times, though last I checked it was quite out of date. Far from ideal, but still significantly better than most companies: https://developer.remarkable.com/