It reminds me of a mini-story within Michael Lewis' Flash Boys - there was a massive project to drill through the solid granite of Pennsylvania mountains in order to lay a new fiber-optic cable so that High-Frequency-trading firms could use it to get their data quicker between Chicago and New York. It was done at huge cost, I think around $300m. The Fiber-optic cable could transmit data between the locations in around 13.1ms - 13.5ms.
However, an alternative option of Microwave towers was setup and installed to transmit data between the same locations. The Microwave Tower could do the same, but around 8.5ms-9ms, ~30% faster. And it didn't cost anywhere near as much.
I worry that not only are those current capital expenditure plans wildly unaffordable, but also that the risk of an innovation rendering all that infrastructure obsolete can't be ruled out. It's a massive gamble.