I think Discord's Achilles' heel for enterprise is its UI unfortunately.

There's no way that my company would adopt a platform so "fun" in the way Discord tries to be. Animated characters, a logo which looks like a gamepad, etc...

It sucks, because I use Slack for work and mostly Discord for personal use (mostly dev communities for different companies), and Discord is far and away a better experience. If Discord provided a "cleaned-up" offering for orgs like mine (finance), I think it would be an instant hit.