I have good news: they (RM2s) are often available on ebay for much less. People buy them thinking they're getting something like an android tablet, but they do nothing out of the box apart from showing docs and taking notes. Sometimes they're returned immediately for a full refund, but often they sit in a drawer, untouched, till they get offloaded on ebay for - comparatively - peanuts, letting us scoop them up and breathe new life into them (koreader rocks, to start with).
They are quite hackable, but a lot of the mods rely on some funky QT hacking… it’s all a bit kind of undocumented. I was able to get Codex to get full Chromium running in a chroot and render the screen via Xvfb though which was pretty cool and is somewhat usable, so I guess most things are possible with determination
I have been using it to read HN, as an RSS reader over my news and blog sources, generate audiobooks on topics I want to understand with ElevenLabs, Exa and OpenAI and listen via connecting its bluetooth to my speakers and even as a remote Claude Code & Codex approval sidekick.
It is amazing that a $100 device with a single core and 512mb RAM can do so much and run for so long.
Here is the open-sourced platform https://github.com/BandarLabs/Cobalt
This SDK provides more of an android/iOS type framework to use underlying hardware like bluetooth, wifi, battery and a bunch of UI components for creating complex apps with eink rendering, notifications, managed windows, OTA updates, a simulator, a sidekick mode for your apps and more.
Not to sound like certain influencers but computers are pretty fast and the state of modern software is incredibly wasteful.