Wow, what happened to URD? That is a strange stance to have, "We have never build render models but they should look and behave good on track and that is what we do."
So your standards are, if it behaves good its good enough? RSS doesn't have this attitude, neither does VRC. If your going to charge people and in your mind is, 'as long as it behaves good' is sad.
RSS does everything right, everything is pushed for maximum value for the customer and there level of detail is like no other - None.
This is what URD has fallen to? Shame...
Again, RSS doesn't have the philosophy of well, if it behaves good its good enough.