Long term this sounds like a terrible idea. What happens when you want to search for a message or attachment you got 3 months ago? Good luck via Twitter. What

Long term this sounds like a terrible idea. What happens when you want to search for a message or attachment you got 3 months ago? Good luck via Twitter. What happens when Twitter imposes some TOS that you don't like or stifles innovation by closing their platform? What about the fact that any 3rd party app you give read permissions to can read your direct messages? The list goes on and on. I use Twitter but in the big picture it's not remotely close to being able to replace email in the long run.