There's a difference between having "a single standard", and having "a few popular ones" (which Exchange contributes to). The big downside it that apps still n

There's a difference between having "a single standard", and having "a few popular ones" (which Exchange contributes to). The big downside it that apps still need to either support two protocols, or live inside on of two bubbles. I really with Exchange would adopt IETF standards (but I guess that's not in their best interest).