Macrocells have 'macro' coverage because they are indeed better located and more powerful (and lower frequency than mm-wave). But this tends to get smaller and

Macrocells have 'macro' coverage because they are indeed better located and more powerful (and lower frequency than mm-wave). But this tends to get smaller and smaller because of higher throughput and higher capacity demands. 5G/mm-wave/densification means more, smaller cells. In any case, the key to ubiquitous coverage is the cellular aspect: You don't build a taller mast with a more powerful transmitter. You add more cells.