Think of the scenarios where Wi-Fi performance suffers. A sports stadium or music concert with thousands or tens of thousands of people. You make a phone call o

Think of the scenarios where Wi-Fi performance suffers. A sports stadium or music concert with thousands or tens of thousands of people. You make a phone call over Wi-Fi and the other person complains "you're breaking up." A convention floor with hundreds of booths. An auditorium with hundreds of people with an open laptop. LTE and 5G have much more consistent latency, and can provide true quality of service mechanisms. Wi-Fi has 802.11e that moves VoIP packets to the front of a series of queues but this is only a probabilistic process not a guaranteed time slot every 20ms. Of course licensed channels are an important part of this carrier grade experience and Wi-Fi on a low duty cycle 5GHz channel is often good enough.