[Kushan]

Yeah, if the channels are full to bursting, I can't see how you'd upgrade an area without loss of service. You're absolutely right about corners as well, fibre doesn't like them very much and coax is super forgiving.

In spite of there being a possible upgrade path, I don't really see Virgin doing it any time soon. As Skie said, it'll only be if the cost of maintaining coax goes above installing fibre and I just don't see that happening in the next decade. Ye ol' coax has plenty of life in her, yet!