Well, here is another reason to resist using Slack:
[…]when you use
/meon the IRC gateway while in private chat with someone, Slack just drops the message on the floor and doesn’t deliver it!
The company brags about their IRC gateway to lure in more groups and teams, but Slack and IRC are two totally different beasts: there will always be an increasing amount of pieces that get lost in translation.
The Slack-IRC gateway is just a trick to lock more users into the walled garden. Resist!