In my area "TCI" was the largest that eventually became comcast.
At that time i went to Sprint DSL training and internet over cable didn't exist yet.
Sprint claimed their DSL format could bring up to 200Mbs over existing twisted pair.
As we now know, that never happened.
I recall telling the instructor that i felt that internet over coax would be much faster and the cable company infrastructure was already there.
I invested all i could spare in cable internet.
One of the best decisions i ever made.
Today we can get 1Gbs over cable.