Agree with everything you've said. Additionally, consistent rendering. If you've ever tried to send an email campaign and had to support all the old (and some

Agree with everything you've said. Additionally, consistent rendering. If you've ever tried to send an email campaign and had to support all the old (and sometimes surprisingly new) Outlook clients and Lotus notes, you'll know just how painful that is. Email must be: * Secure and encrypted; * Have proven identity; * Have easy to fabricate and predictable rendering; I feel like the ability to have forms and charts is very nice, but adds a lot of complexity, especially from a security point of view. I'd be looking at this kind of "application level" functionally being a layer added optionally on top, not being in the core protocol.