Yeah, I think the kicker with managed services vs. self-hosted is whether you're paying for capacity or by usage. The thing with capacity driven costs is that

Yeah, I think the kicker with managed services vs. self-hosted is whether you're paying for capacity or by usage. The thing with capacity driven costs is that you will always have some unused capacity (and indeed you should as a safety measure). If you're paying by usage, then that pushes the issue of managing overhead capacity onto the service provider.