NuTyX Linux

NuTyX Linux is not an immutable distribution. 
NuTyX is a flexible, independent Linux distribution designed for intermediate to advanced users, based on Linux From Scratch (LFS) and Beyond Linux From Scratch (BLFS). 
Key details about NuTyX include:

    Mutable System: Unlike immutable distributions (like Fedora Silverblue or MicroOS) that use read-only filesystems, NuTyX allows users to modify the base system, following a traditional, mutable approach.
    Package Management: It uses its own custom package manager called cards.
    Flexibility: Users can install individual binary packages, groups of related packages, or compile source packages via its ports system.
    Init System: It supports sysvinit, and is known for allowing flexibility in init systems. 

Immutable distributions, examples include Fedora Silverblue, openSUSE MicroOS, and Vanilla OS.