I think ptt is a good thing. Being able to hear everything on the other side can be very nerve wrecking on the other end of the line where you cannot do anything.
Just an example that happened for real in orbusvr.
Hear someone coughing their lungs out and near choking… i stayed around that person for 10 minutes untill she came back… you feel very tense to say the least if you are in a situation like that and you cannot do anything but wait… luckily that person came back in the end and talked to me and told me it was a normal thing for her she experienced on a daily basis but if that wasnt the case and she logged off it would def kept me wondering for a very very long time untill i get a chance to see that person again,