While Obsidian is undoubtably a good piece of software

Don’t promote proprietary software!

Self host filebrowser quantum! Small, light and easy to configure.

It is currently in beta, but it is on the cusp of a stable release.

PostmarketOS has piqued my interest as the most promising Linux phone OS. I would give it a try if you can put up with an immature system, at least when compared to Android.

They offer DRM free audiobooks, and the prices with subscription tokens are really good, 10€ for any book.

Check out obtainium:

https://github.com/ImranR98/Obtainium

It get updates straight from the source.

Need a source on this one, I want to read up on this.

NovaCustom: Coreboot, Linux support, customizable, spare parts.

I have no personal experience, but their products seem nice, though expensive.

https://novacustom.com/