Comment by zamadatix

Eh, good on them for not trying to act like Teams targets the same use cases as Discord just because Teams is an internal product. One is focused on the internal chats and groups within the business with occasional well defined outsiders and the other is more targeting something like live social media for consumers.

I'm not even sure if there is a way to have a team/channel for external users that they don't need to be invited to (I know you can jump through hoops to make it so they don't need to be guests in your tenant at least) or that there should necessarily be something like that in the first place.