Semi conspiracy alert: 5G is mainly motivated by surveillance through IoT. 4G is still mostly ok as a regular "cellphone" network but isn't cheap enough to be embedded in every device. Many consumer goods now have a wifi option (like my new dishwasher) but it still need to be configured after installation, which many people won't care to do. 5G will make it cheap enough for manufacturers to bundle always-on cellular modems in every device. The cost of networking plan will be assumed by the manufacturer and be offset by the value of telemetry data collected and subscription services made possible by the always-on network. Special dishwasher cycles for an extra 3$ and other shenanigans. Obsolence no longer has to be preprogrammed but can be declared unilaterally at the time most convenient by and for marketing departments.