It is very similar with some small (but significant) differences:
1. It doesn't require a huge manifest per site, instead the manifests are broken down into: list-of-packages-per-site and list-of-files-per-package
2. There are no special directories in the same namespace that regular files can live in
3. It is deduplicated (every file is referenced by its SHA1) making the need for making packages share files that they have in common unnecessary.
4. It lives in a more sane place in the UNIX filesystem (/opt)
5. It doesn't use special characters to denote special meaning (this is why I stopped using LazyFS)
6. It uses FUSE instead of its own kernel module
