No need for arguments over sfc2.net and d.net, both are there for different purposes.
I would say this though, the day that sfc2.net doesnt exist or d2 operations are moved to another location would be a sad day. And i am sure there would be plenty of people within the community who would voice their opposition to such a change.
With an active player like Jeff as admin now at sfc2.net i am sure if there is any downtime or issues with sfc2.net he will be there to try and fix them as soon as possible.