> I do not think there is anything novel here.

Absolutely wrong.

Tumbleweed is a conventional distro. You're root, you can do whatever you want, you have full R/W access to the entire FS, and updating is by installing lots and lots of packages into the live OS while it is running.

Aeon and Kalpa are immutable: the root fs is largely R/O even to root, and you cannot install or update packages on the running system. To install packages into the OS itself you must reboot, and installation is transactional -- it can automatically undo changes that prevented a successful boot.

Kalpa is the KDE desktop version of MicroOS.