Right we were using Skype. Then one day I got an email about Microsoft moving us to Teams. I was able to delay the Teams roll out by 1 month but I could not prevent us being moved to Teams. Skype was part of the Office 365 level that we subscribe to and we were using it. MS replaced it with Teams.
Honestly, Teams is better than Skype. But it wasn't until covid forced everyone home that we really started using Teams, that first week was painful.