Of course no-one has the answers or absolute evidence of most stuff talked about here. The key point is that when you make your points as to why you thinking DVD is enough (or any other subject) you don't make sweeping comments that the case doesn't need discussing. You should really be hoping someone takes up your points and questions them. You should be here to question your own assumption and preconceptions to see whether they are right or wrong. eg. If you believe some technique can be used on some system, you throw it out there and see what responses you get, whether they confirm your views or not. As example, from your citing the procedurally created FPS, you should have been looking forward for views that either confirm this is a good example indicative of however much procedurally generated content can contribute, or for replies that question it's validity. Blanket 'full-stop' comments don't encourage that.
I'm not all all bent out of shape by your opinions that DVD is enough, or that BRD isn't necessary. I'm not the slightest bit bothered that you have offered evidences for opinions that I disagree with. What bothers me is a reluctance to discuss the points on an intellectual level. In pretty much all conversations on this board there isn't much evidence to prove anything, but the 'fun' comes from the tit-for-tat debating and picking other people's brains, finding out what things you know that are right (or probably right) and what things you thought you know that were wrong. In this case, the evidence proving whether you need BRD as a gmaer or not isn't there, but probing the subject can help form an expectation from logic. eg. If the arguments against compression and procedural generation are sound, the merits of BRD can be seen without it being proven in real games.