Like the other commenter, I don't see XML as being an actual problem. While it might be an issue on the engineering side, the data representation details are al

Like the other commenter, I don't see XML as being an actual problem. While it might be an issue on the engineering side, the data representation details are almost irrelevant to adoption. I believe most of the issues you listed here stem from federation - the support of different features, slow rollout and thus no e2e encryprion by default. If we look at non-federated solutions to unify messaging, we have one under the name of Facebook. I don't think it's really what people mean when they say unified though, for reasons ranging from lack of choice, control, and being a single point of failure. In the end, I think that while federation brings obvious pains, there's no other choice. > Strangely enough you probably could use a blockchain to resolve some of the issues I raised, I'm interested to hear what opportunities you envision in that area.