Yeah we decided to integrate with Teams because I had that exact experience in the past. I was at a company that decided "we're using Teams". We weren't allowed to install alternatives like Discord or Slack.
Teams itself has some limitations that are easy to improve upon. They have no way of doing a huddle/pop-in-style room. They screw up the presence signaling in a way that discourages pop-ins: if you join a call with someone your and the other participants' status is set to busy/unavailable. From other peoples' perspective this isn't very inviting, and doesn't indicate that the conversation is public. Teams also limits who can share screens to only 1 person at a time.
Teams itself has some limitations that are easy to improve upon. They have no way of doing a huddle/pop-in-style room. They screw up the presence signaling in a way that discourages pop-ins: if you join a call with someone your and the other participants' status is set to busy/unavailable. From other peoples' perspective this isn't very inviting, and doesn't indicate that the conversation is public. Teams also limits who can share screens to only 1 person at a time.