Reading between the lines: "No way RBR can sustain this level of success in the long run."
Honestly I'm inclined to agree. Do RBR have the technical resources of a team like Renault/Ferrari/McLaren to quickly adapt to large rule changes, such as the re-introduction of Pirellis, KERS, etc?
No question RBR had the best car this year, but how good will their car be next year, or 4-5 years down the road? Gotta remember that Lewis is still a youngin. I mean last year the BrawnGP car was just simply unstoppable, but they were midpack this year, even with Ross Brawn at the helm.
With Renault selling the factory team, there's no reason to think they wouldn't work even more closely with RBR to custom package their engines, KERS, etc. Regardless of who buys the Enstone team, RBR is Renault's best bet at F1 success.
There's already been a separation and tension between Mercedes and Macca, it would be foolish to think merc would be working as closely with Woking moving forward.
Budgets have been slashed, RBR has made steady improvements every year. As long a Newey doesn't get bored, I don't think RBR is going to slip relative to the other teams.