Impact of Infinity

Question

They are just finishing off upgrading my local exchange to infinity which I understand will be offered from next March.
Since we currently get on average 4.5Mb download and .7 Mb upload and are not heavy internet users we probably won't rush to upgrade to infinity.
But my question is this. Post infinity upgrade at the exchange and I presume the connection of fibre optic to the green box in my street, does all traffic go down fibre optic from the exchange to the cabinet or is the old copper wire retained?  
If all traffic does go down f/o does this have an implication for improved adsl speeds for luddites like me who do not upgrade to infinity as there might be less signal problems? And if the old copper is kept for us luddites, might again this mean an improvement if people move to Infinity and f/o and leave the old copper to us?
Just curious (to know, that is).

Answer 1

Infinity goes by fibre to the cabinet then by copper from the cabinet to the home.
I don't know if ADSL speeds will increase but I am still on ADSL and I have noticed that since the uptake of Infinity by just about everybody but me, I don't suffer from any drop in speed at the peak times.
I expect this is because there is less congestion on the old steam driven ADSL. Like you this more than serves my use of the Internet. I can stream movies, my son can play games and my wife can watch iplayer all at the same time and there are no problems or stuttering.