I was with Demon from the start. Must have been about 25 years
... and then Vodaphone came along and invited me to partake of a compulsary upgrade from 32 static Demon IP addresses to *1* Vodafone static IP address.
... and their salespeople kept calling me about ten times to ask me why I didn't want to upgrade.
So I had a great deal of fun migrating all my servers over to Virgin before the Demon deadline cut me off.