With P2P sound there is no need for expensive slow servers serving free tier users. Scalable! But companies have a hard time letting go of control and 'value add'.
For some markets P2P is not acceptable. For example in "gaming" markets people will DoS any IP they see so hiding your IP behind a relay service like Discord is essential.
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 ...
