[zozbot234]

> The way it works (in my incomplete understanding) is that the root filesystem (running on Btfrs), specifically /usr and /var, are actually a read-only image. You can write changes to it, but each time you do, you have to rewrite the image. Each time you boot, you boot that immutable image.

Sounds like a glorified LiveCD distro. (In fact, it's almost exactly a LiveCD with 'persistence' once you account for other parts of the filesystem that are not 'immutable', such as /home/ .) Not sure what's supposed to be so innovative about this.