Re: "Cost" of switching - email addy
Yes, this. In fact I could probably manage my transition away from the email domain originally provided to me by Telewest, but my son and my mother both have alias addresses on my account, and it would be harder for both of them (for different reasons), so I continue to bung large amounts monthly to Virgin Media. There's no portability of email address. Maybe there could be mandatory forwarding of mail for a fixed period of time?