Earlier quoted context omitted.
Unfortunately, the "nobody owns" feature of EMail is something Slack lacks and probably always will. Email is a federated, decentralized protocol of distributed mail servers that anybody can set up. Any email server can participate with any other email server. That's something that Slack will never have (it does interface with XMPP and IRC, but the service itself is centralized.) It is hard to overstate how critical…
> XMPP, IRC I actually think these guys are interesting exceptions. Yes, they are still around, but they've largely been eclipsed by proprietary solutions. Why? Why did Twitter storm to success XMPP was ostensibly the same thing but with all of these good qualities (open, federated, decentralised, etc.). Still to this day messaging is a battleground for new entrants touting completely opaque solutions. It seems like…
Edit: GTalk shut off federation for XMPP extensions like multi-user chat and Jingle (Voice-Over-IP).
As for IRC - yes it has been largely eclipsed by proprietary solutions. I chalk this up to the lack of a compelling, truly simple web front-end for it. For instance, Slack seems to imitate a lot of the feature of IRC - it would be easy enough for it to just be IRC underneath, and maybe it is. But as far as I know nobody ever wrote a true web client for IRC that was compelling enough for the mainstream.