Actually, interoperability between apps is possible through things like URL handling and UIPasteboard. I am dreaming of the day that something like the UNIX to

Actually, interoperability between apps is possible through things like URL handling and UIPasteboard. I am dreaming of the day that something like the UNIX toolchain can be assembled by sending data from one app to another like this. Enough app developers just need to get together and decide to make it. I suppose that you could not script it though, so it would still be more limited. But you could send data step by step through a series of apps in a chain, which could allow for creative interoperability.