It's a holdover from the days of teleconferencing, no? When participants join, all they'd hear is a little chirp, and then invariably, someone would ask "who j

It's a holdover from the days of teleconferencing, no? When participants join, all they'd hear is a little chirp, and then invariably, someone would ask "who just joined?" Announcing themselves just seems like a time saver that is no longer necessary in the videoconference age.