Comment by tom_

I don't disagree about the chat UX. The chat vs channel distinction was not at all clear when I started using Teams, at least not to me, and actually not to any of my colleagues either, and it was a large part of why we quickly started using Slack at that place. It wasn't until I did some work with a client that had long gone full Microsoft that I encountered somebody that had an idea of what was going on.

(In fact, it's not really that complicated. If you squint right, it might even be more useful than what Slack gives you! But something about the UI just didn't make it remotely obvious.)

Anyway, even if the text chat isn't awesome, for video calls, we never had a problem, and it scales pretty well with number of participants.