@jk the wild thing about this, too, is that some of the tools like docker and venv sort of break the "systems view" here because there could be stuff running using filesystems that you don't see from the "default" view :/ Hm. There probably is a way to see the cgroup fs mounted namespaces as a filetree in linux, at least, but I don't think it's in the sysadmin's "default view" so to speak. Your idea of different filesystem trees for different users/tasks is very plan9 and very UNIX, though, imho.