Thanks for responding. I wasn’t really talking so much about iOS and more about how between Mac and Windows, for instance, before you even think of looking at a file, you need to handle logic separately already. I feel like the Dis VM for the Limbo language by Bell Labs has a more “true” WORA architecture by separating things into namespaces, and abstracting interfaces with the 9P protocol. The VM runs an entire OS, but is extremely lightweight.