Slack doesn't get money from casuals, so if your company says "hey we use IRC," you're going to plop a client on your laptop and be done with it (and there are

Slack doesn't get money from casuals, so if your company says "hey we use IRC," you're going to plop a client on your laptop and be done with it (and there are web clients besides). It's not a learning curve you'd have to worry about.