Email will always be around, but I must say that "Email killers" are really going to be successful. For example, I don't remember the last time my team sent an internal email that wasn't a forward from a client. We use Slack. Exclusively. We organize projects around it, sales efforts, everything. It has the async nature of email, the separation of topics like email, and the search power of email. It also means that n…
It is hard to overstate how critical this fact is to Email's future. If you look at most of the canonical Internet protocols (SMTP, HTTP, DNS, XMPP, IRC, even BitCoin) - they have this fundamental feature in common. Even though they're part of the application layer of the Internet, they've become fundamental protocols that other technologies rely on. They are part of the infrastructure of the Internet.
I say this is someone who just started using Slack and loves it. I still can't see it replacing email, though.