While desktop might need a rethink, the motivation here is... hard to follow. Just don't share your desktop? Share a single window? But I'm even more flabberg

While desktop might need a rethink, the motivation here is... hard to follow. Just don't share your desktop? Share a single window? But I'm even more flabbergasted by the idea that mobile, of all places, is a good place to mimic. Have you tried finding documents on your phone? Go on. Give it a spin. It's a disaster area worse than desktop. It's a good learning opportunity, though - it makes clear that if you really want to fix things, the very first thing you get to tackle is interoperability - because that central air traffic controller you want? That needs access to all the files. That's already tough - commercial interests counteract it - but it also sits at the heart of privacy. If we have excellent interop, we have excellent interop with any and all actors. That includes ones you might not want to have access, unless we succeed at building a good and understandable security model.