... still confusing. There is an (incorrect) belief by some that capacity is built once and no $$ are added until some new technology comes out. e.g DOCSIS3, FTTH, etc. That is flat-out false
Last mile fiber/HFC is split regularly across the sub base doubling infrastructure needs, router cards are added throughout the entire path, more / expensive optics, down/upstream CMTS cards, etc are added constantly to keep up with capacity/usage increases month over month. Look at ISP financial reports. Billions are spent on adding capacity regularly.
By some estimates, Internet peak usage is growing by 50+% / year (cumulative). This means in 5 years the infrastructure will need to be 500% larger. New subscribers/revenue is not the main driver of this, it is increased usage and less than 1% of the users are driving 20% of all the growth.
"Too often we... enjoy the comfort of opinion without the discomfort of thought." - John F. Kennedy
South Bend, IN
To put it more straight-forward. The hardware is there to handle it, the resources and manpower are there to make it. The capitalist market is there to prevent it. Myth dispelled.