Let's say your company contract for services with ISP1 and get an IPv6 prefix and AS#.
Then 3 years later, you are unsatisfied with services and decide to terminate contract with ISP1 and go with ISP2. My understanding is that a new prefix would be assign to your company by ISP2.
Is IPv6 going to offer you any easy of transition in this case than in what we see with IPv4?
Do you still need to use NAT as a means to avoid readdressing your internal IP addresses? (which were associated before with ISP1).