When our daughter was a teenager, she and her friends used three-way calling to their advantage. She would call two friends who had three-way calling, and then each of them would call two people. They would end up with their own conference calling. Conference calling is used by people for various reasons.
Have you ever used three-way calling? We haven’t in a long time, but when there’s a need to talk to family members about something, then it’s great.