I don't particularly like Discord (which I assume you meant) because I don't see a monetization plan for them that doesn't screw over their users. With Slack, I know that they have enterprise customers that essentially pay for the free users. Discord has nothing like that, and I can only foresee two outcomes: running out of money or selling out their users. Charging for their service won't really work, either, because gamers are a pretty price-sensitive group in my experience and Slack is still free.

Yeah I meant Discord. Not sure why I typed Discourse there.

You have a great point about monetization. My understanding is that their monetization plan is to start selling things like sticker packs (e.g. how other messenger services get monetized), but I don't know how likely that is to succeed.

Wonderful case in point; one of my groups is on slack, whereas my serious raid group is on Discord (which I assume you meant :) ) and a third group is on TeamSpeak; up until recently Mumble was in the mix as well. It's really a portmanteau of silly apps to keep track of.

Yeah I meant Discord.

Having a mixture of groups is hard. When I was playing Destiny, my group there was actually using GroupMe (which is pretty awful for a variety of reasons). I actually created a Slack and wrote a GroupMe<->Slack gateway, though it kept breaking because GroupMe's API stopped sending messages until I cycled the connection, and I eventually had to shut that down when Heroku changed their free tier (which coincided nicely with me losing interest in Destiny).

My current WoW guild (of which I'm a casual, not raiding, member) uses TeamSpeak, and I don't know why they're not on Discord. It's annoying enough that I don't usually bother to join it.