One thing I think missing from this article is a discussion on range. The important thing to note with all EM-based communication tech is that the range decrea

One thing I think missing from this article is a discussion on range. The important thing to note with all EM-based communication tech is that the range decreases as the bandwidth increases, due to the inversely proportional nature of wavelength and frequency. So it's all trade-offs. 5G requires a lot of buildout, as its range is something like 1000 feet, whereas 4g is something like 50,000ft. Said another way, we could've started with 5G before doing 3g/4g etc, it just would not have made economic sense before everyone had a smartphone that they wanted to stream HD videos on which justifies building out a network that needs a tower every 2000ft.