Clicking a Teams meeting link from Outlook Calendar opens the pre-meeting screen to allow enable/disable of camera/microphone, plus it also loads up a little reminder window with Join and Dismiss buttons _over the top_ of the Join button of the pre-meeting screen.

Every time.

And then there's the fact that, if Teams wasn't already loaded, you can be up five minutes late for a meeting waiting for Teams to roll out of bed despite having clicked Join bang on meeting time.

I don't have the most up to date system at work, but it feels like 90s wait-computing.