My answer, in short, was to say that I see it as more of an enterprise
play because it's a managed service and the hardest part of
provisioning is typically the order cycle.
If you are an ISP, you are theoretically multi homed by definition
and your providers are going to remain fairly stable (you hope)
based on your own needs.
My point remains: designs based on such assumptions are not a good idea,
since these assumptions are by no means fundamental and could certainly
change. People get creative with how they announce prefixes, change
upstreams, etc., and you can't assume that things like this would stay
the way they are.
