It's been a while since I poked my head in here. I know lots of the Metaguards are on Slack and I've been there a little bit but overall I didn't find it to my taste.
Then again, for me the only reason I spent time in chat at all was due to peer pressure. I was actually enjoying the Neatchat for a while, but eventually it wasn't all that fun for me anymore.
I don't understand why people seek real-time chat at all, but I suspect that maybe having a chat service on the forum would appeal to them. Though if they're already satisfied with Slack they might not migrate back here.
Never put off until tomorrow what you can put off until the day after.