I wasn't thinking about another data storage system but more about what core abstractions should be provided by an OS? For example, could the Erlang model be a

I wasn't thinking about another data storage system but more about what core abstractions should be provided by an OS? For example, could the Erlang model be an OS? Say the OS provides a namespace for a constellation of communicating processes. You still have freedom to implement various languages and configuration systems but you submit your code to a process rather than store it in a 'file system'. Storage is accessed via a process and can be switched out with another process with a different implementation, etc.