That seems like another shot in the foot though. Apple and google are gatekeepers of notifications. Email is still the most robust choice for infrequent notifications. I wish email had been extended to implement temporary notifications
The problem with email on iOS is that there's no way to do instantaneous notifications without paying Apple at least $100/year for a custom app with a certificate to do push. The mail app only does polling (no IMAP IDLE) so the latency on notifications is very high there.
The consequences of the iPhone on the internet are extreme and I don't think most of the people involved in internet protocol design have fully realized just how bad it is.
