Another upside is the easy permission management.

You can revoke network access from your password manager to reduce attack surface; you can revoke camera access from your chat app to prevent accidentaly enabling it; You can restrict an app’s file system access to prevent unwanted changes; etc.

It’s not yet fit to protect from malicious apps, but it still finds some use.

NixOS and Guix are both very beginner-unfriendly. If you’re not very comfortable with Linux and its command line, I’d recommend against using them for personal systems.

Tl;dr: They use proper workflows for building the OS.

No Idea why they advertise this on their end-customer facing sites.

Source: https://universal-blue.org/