Sure but it should not be a problem for friends or teams.

I use Steam voice chat to talk to my brother and I find it by far the best one. Low latency and no filter BS. I don't think it is P2P though.

I and my friends used Ventrilo earlier and the level of QoS you get from hosting on a low load computer with like 4ms ping to each node is insane compared to modern alternatives ...

For a two way call Ventrilo is essentially P2P.