Mind Boggling

I understand that 5G communications is a line of sight (LOS) technology. Can you imagine how many 5G transmitters/receivers will be necessary to cover fully the United States (or the world) with 5G? And how often they will need modifications to correct for LOS dead spots ... say when new small branches grow on trees or new structures are built? 

Or what happens when a driverless car hits a LOS dead spot (say from passing trucks) at a critical moment?

It boggles my mind ...

Afterthought: These technological challenges suggest to this blogger that 5G might be either a huge market opportunity ... or a (China-driven) gigantic wet fart.