Comment Re: The bandwidth is as unlimited as your money (Score 1) 129
You are half right. To serve NEW customers they have to do all of that.
To improve service for existing customers they just need new Central Office equipment. And even then only switches. The equipment manufacturers are constantly squeezing more performance out of the same power draw. (A 48 port 1Gb switch uses about the same power and cooling as a 48 port 10Gb switch).
The rest of the infrastructure (wiring between the CO and the customer is already there).
For example, the home I live in was built in 1996 and I have fiber to the house.
The largest issue here is that ISPs want to spend the least amount of money possible to retain their customers. The lack of competiton in most markets ensures that they will have a virtually unlimited supply of "new" customers.