The Teams UI has some huge blind spots.

Now, you can finally sort-of-almost-reliably switch between different accounts. This used to just not work, for me.

But you still can't see what account you're actually logged in with. I can only see my initials and name - and my initials and name's the same for all 4 MS accounts I have (private/family, employer, client 1, client 2).

When you press "back" from an open document, you don't go back to the folder you opened it from, but to the root of the document library.

The conferencing generally works OK-ish, but sometimes it just used another audio device that it says in the settings. The simplest solution is to reboot. Sometimes it works to switch device, re-start teams, and then switch device again.