LotRO had a pretty decent in game voice chat that only worked within parties. You could turn it on or off as you see fit, use it with our without a mic so you can just listen if you wanted workout having to talk... It was actually pretty decent and (for the most part) was generally used for ours intended purpose of helping raid. That being said, if you didn't have your mic connected and wanted to use voice chat, you had to completely closer the game, connect your mic and start it up again. Using a specific voice chat program allows a little more flexibility, Ann's also allows you to talk to people even if they can't get in game, so I think that along worth the reloading issue makes an external voice chat more useful.