We use MS Teams at my company. The Word and Excel in the Windows Teams app are so buggy that I can almost never successfully open a file. It just times out and eventually shows a "please try again later" message nearly every time. I've uninstalled and reinstalled the Teams app four or five times trying to fix this.
We've totally given up any kind of collaborative document editing because it's too frustrating, or we use Notion instead, which for all it's fault, at least the basic stuff like loading a bloody file works...
