I’d just prefer something genuinely open. I can and did put KOReader on my Kobo, but it still runs its own proprietary firmware or OS or whatever. That’s probably based on or built on top of something open like a Linux kernel, but a proprietary layer still sits on top

I’ve been considering getting… I think it’s the Pine Note? It’s from Pine64 and is supposed to be a tablet with an e-ink display, but last I checked on it a year or two ago, software and driver support was still not quite there. It’s all open hardware, though, so it’s just a matter of the community getting it up to speed. Probably about time I look back into it, but my Kobo isn’t that old, so I kinda hate to spend so much replacing it.