It's not about finding applications, it's more about the ability to have multiple versions of the same package installed and used concurrently. Best you can hav

It's not about finding applications, it's more about the ability to have multiple versions of the same package installed and used concurrently. Best you can have with FHS is something like /usr/bin/python3.8 vs /usr/bin/python3.9, and this requires package maintainers to manually support this. Most packages don't do this, so if you happen to need - just a random example - an ancient Firefox version installed separately, "traditional" solutions like rpm or dpkg won't really help you. Plus, a different organization of the filesystem, where everything that belongs to a package is stored under the same base path, rather than being spread across the whole FS. I don't really remember GoboLinux ideas, but IIRC they had something about leveraging use of the filesystem as a part of package manager.