It’s “good enough” and integrates into existing Microsoft solutions (just Outlook meeting request integration, for example), and the competition isn’t dramatically better, more like a side-grade in terms of better usability but less integration.
Seriously, I'm not a fan of Teams, but the sad state of video calls in Slack, even in 2024, seriously ruins it for me. This is the one thing — one important thing — that Teams is better at than Slack.
You can resize it.