I haven't used windows for 20 years and yesterday I had a teams teleconference using Firefox on Linux. It works noticeably more poorly than most similar systems (jit.si for the win) but it works.
It actually worked decently once I used wired networking. Probably gobbles up bandwidth, typical Microsoft :D
The main problem is that randomly, Teams invite end in some "an unkown error occurred" and when this happens there's no recourse. It never happened with Zoom, Jit.si, Goto Meeting, Google Meet or whatever else I've used.
The absolutely worst of all is WebEx, fortunately it's rapidly disappearing.