As a franchise over the decades, yes, but look at where they have gone with it. I can't say I've played all the titles, especially since PS3 era, but I bought the Shift games and dropped them immidiately cause GT5 was miles ahead. Successful yes, but I think we all know it's plateaued in terms of technicality, that's why I was saying whoever races NFS for Porsche is.. umm.. to be nice, I'll just say loosing out.
It's a long shot to think that but I know PD has approched Porsche for sure, like Turn 10 had, what I'm saying is maybe PD deliberately haven't put a single premium RUF in as a kind gesture in hopes Porsche get back to them soon. I mean how much longer do they want to be the only car company left to sell their name exclusively, and to a now terrible racing game franchise?