When team members need to get quick answers to questions, provide fast updates, or get someone’s attention right away, Slack is the way to go. Instead of having to juggle emails, text messages, and other forms of communication across a number of platforms, Slack provides a streamlined place for conversations.
In effect, an unbundling project has to overcome two different network effects on Reddit - the subreddit community itself, and the community’s connection to Reddit as a whole.