It's primary selling point, at least initially, was being much, much better at its job than teamspeak and its ilk. It ate forums because once people had access

It's primary selling point, at least initially, was being much, much better at its job than teamspeak and its ilk. It ate forums because once people had access to adequate (not necessarily good, or even better) text communications built into their VoIP solution, people just used that instead. Network effects then killed the forum.