Let's not put the devs (nor anyone else) through the pain and misery that is dealing with Discord's disgusting proprietary API and ToS just to implement Discord chat ingame, even leaving aside the fact that it's a whole new can of worms regarding metagaming abuse, there's so much better and actually community friendly replacements for Discord to achieve such thing, like for example XMPP, which could be hosted on a community managed server, same for voice chat with Mumble by the way, the tools are out there.
