[vel0city]

> that's no different than just being in multiple calls but just swapping between them

Its very different.

Lets log into Discord. We see Alice, Bob, and Charlie are in Room A. Domingo and Ed are in Room B. Francine, Greg, and Hoarice are in Room C. To swap between these three conversations, we just double click on one room or the next. We're instantly swapped between these calls.

Lets say your group of friends has three different calls going on in Skype. How do you quickly see who is talking to who? How do you quickly hop from one conversation to the other? Like in Teams, if a few people are in a call together, how do I know? Sure, I can see Alice and Bob are in a call, but how do I know they're in the same call? How do I know that Charlie is also in there? How do I join their call in progress if not a scheduled meeting? If I'm in the call wtih Alice, Bob, and Charlie, how do I know that Domingo and Ed are talking about the topic of Room B?

The ergonomics of the "call/meeting" versus "room/channel" is vastly different. They both very much have their place, but they're not interchangeable. Forks are good for eating, but it turns out spoons are useful too.