EDIT: Not trolling. I just care about having functionality that works, not necessarily speed.
It's not stable at all. Audio calls are generally okay, but often screen sharing just doesn't seem to come through either.
Teams was widely used at Whole Foods when I was there (I left in August of 2021), and that’s not a small company. And it worked very well. Better than any other chat/video conferencing solution I had seen to that date.
Now that I’m working at AWS, I’ve used Slack more extensively, and I’m still not convinced that it’s a better chat client. Maybe. Maybe not.
Internally, Amazon and AWS primarily use Chime for videoconferencing, and it’s getting better. I think Teams is still a lot better in that role, but Chime is catching up.
I have hated on Microsoft since at least 1984, if not before. And I dearly loved the early days of Skype. But even I must grudgingly admit that Teams is not a horribly bad solution in these spaces. Less bad than most others I’ve seen.
Disclaimer: I speak only for myself and my own personal experiences, not for my employer or any previous employer.
This was an issue for much of last year. In larger calls this didn't happen, but it made teams a painful waste of time and energy for actual team communication, rather than big announcements. Hangouts/meet and zoom both work fine in the situations I'm thinking of.