You can stay on copper as long as you want. But the problem is reliability. It used to be regulated to where they had to provide lifeline service and get your service back up and running within a time limit. But service has gone in the toilet, and reliability is only with un regulated fiber service now. I was providing ideas. I have had FiOS since the summer of 2005, and have been very happy with it, because of quality, and it never goes down as long as I have power on my end. Even in Montgomery County, Maryland, when the power came back after 5hrs, I have 100% FiOS reliability.
My recent experience with cancelations was to over an argument regarding commitment dates that were changed on my account. I am 100% FiOS digital at 75/35 and happy with the technology.
So yes I am a FiOS fan! Quantum rules! So don't take my previous post the wrong way.