On Hacker News of all places what I think gets lost in the monopoly conversation is that it's not just the consumer market you need to pay attention it's the _labor_ market. I always assumed that would more be more readily apparent here. I am often surprised to find out it is not.
In a corporate setting? "We already have Microsoft accounts for all of our users, do you want us to maintain a separate user list? No way. Teams may be bad, but it's not bad enough to warrant that."
What is better than Teams? I don't love Teams, but it's light years beyond what Zoom provides, and the services that Amazon and Google offer were pretty garbage last time I checked.
I also really like Slacks huddles and Discord VC's (we treated them like conference rooms).