At large technical companies as well unfortunately. It’s insane. never knowing who is talking, who is on the line. And that’s not talking about audio quality
There is a whole political/social angle as well. Some people are concall Jedi who can really wield power effectively on calls and dominate meetings better than in person.
We tried 'Skype for Business' but as well as sounding like something you'd catch if you hung out at the bus station, the call quality was atrocious.
*Although we are in Australia.