EDIT: Thank you all for detailing your experience with, and hatred for, this miserable product. Your display of solidarity is inspiring. Now, say it with me:
I work in IT. I think it's popular because it's "free".
With that said, I put up a picture on the office wall of a Swiss army knife with features like syringe, fire extinguisher, axe, etc and have it labeled Microsoft Teams. Yes, it can do 100 different tasks, fucking poorly.
Exactly. Every time I mention some feature I like from Slack to a coworker of mine who loves Teams, they point out how to accomplish the same task, but it's less intuitive, feature poor, and comes with a handful of caveats. But it can do them, and I guess if you're used to it, it can be pretty productive.