[michaelpb]

For Linux, many GNOME-based distros shipped with Pidgin (an open source communication program) well-integrated with the desktop environment, really early on compared to other OS's. I'm hesitant to say "Linux did it first", but it was definitely an early adopter.

That said, it's hard to compare the two given Pidgin is a general purpose communication tool without vendor lock-in (e.g. it's also an IRC client, has peer-to-peer mode, etc), and most Linux installers let you opt-out of these sorts of bundled software.

I think the real issue is some might find MS Teams to be obnoxious software (I suppose, I barely have used it)