All quality problems would disappear if QoS would be implemented across the entire public internet. Your ears are so much more sensitive to small anomalies. I'

All quality problems would disappear if QoS would be implemented across the entire public internet. Your ears are so much more sensitive to small anomalies. I've been deploying VoIP since 2003, both in the US and in Europe. In Europe it is easier to find cheap DSL with QoS applied, which allows laying in a separate circuit for VoIP only. In theses cases there are no complaints. VoIP also works well on fiber. But as soon as one part of the network path travels the public internet all bets are off because there's no guarantee you packets aren't dropped because of traffic spikes. Everybody who thinks the internet is stable in anyway is way off. Route flaps, packet loss, overloaded hops, last-mile problems happen all the time. I could talk about this for hours.