The crucial point is that you can still have multiple VPS's on a single machine, but you're guaranteed they'll all be yours. That is, the only difference with t

The crucial point is that you can still have multiple VPS's on a single machine, but you're guaranteed they'll all be yours. That is, the only difference with the dedicated instances is that there won't be an instance of someone else running on a machine you're also using. I think most people wouldn't want to enable this unless you're required to; chances are that when one instance needs all the resources, the others are busy too, and then suddenly you have all your instances competing for resources on the same machine.