The sandboxed build environment was a side effect of being able to bootstrap on another distro. The "claim to fame" was a fast package manager. Except there's

The sandboxed build environment was a side effect of being able to bootstrap on another distro. The "claim to fame" was a fast package manager. Except there's Chimera Linux now (not related to chimeraOS) and I dare say its got the fastest package manager of all operating systems with a package manager.