[Spooky23]

"Best effort" doesn't mean "Here's your dinner, take it or leave it."

ISPs have been successfully managing aggregate network bandwidth growth for over twenty years.

I work at a place that has transformed it's utilization of the internet via cloud services -- utilization going from 80-120MB/s to multi-gigabit. Adapting to that change was relatively easy and cheap. With the economies of scale that a large Telco has, it's a drop in the bucket.