> so that a user can install the latest version of Python without it ever colliding with the outdated version of Python that the OS uses internally

Consider checking out nixos. Although this is already possible to do in normal distros.

> The OS should define a stable format for the OS to install, update and uninstall these files

Like .deb and .rpm?

> 3. We need a desktop environment that's visually appealing and has a good UX.

Such as KDE and the rest?

> We need centralized, thorough and official user documentation about the OS

Distros have their own documentation already.

> And this documentation should be distinct from the developer's documentation

Why?

> The user shouldn't need to learn 10 different config file formats

You will love nixos then.