There are people who might have to use Teams due to network effect, but prefer to keep closed source crap off their machines. Such people like myself might use

There are people who might have to use Teams due to network effect, but prefer to keep closed source crap off their machines. Such people like myself might use Reddit (closed source for some time now), but use open source app like Slide or plain old Firefox. For such people, an open source element bridge to teams is best of both worlds.