Isn't another huge thing that Slack solves the need to set up a local client? Why is that not addressed in this article, I wonder if the author really doesn't see it as a problem?
IMO Shout is a UI improvement over Slack for the sheer fact that it is 100% customizable.
Pretty nice though.
Absolutely nothing. Nothing has stopped anyone from making a fully featured IRC client with good UX. Yet there still isn't one.