Well we both know your right Skunkers on the keeping pushrods in the motor. DI will go a long way into breathing new life into the LS engines. It just baffles me that the biggest power adder in a NA car is freer flowing heads, and they do not take advantage of it.
the cam in cam timing I have to admit is awesome. I was very enamored with that feature of the Viper when it came out. (about the only thing I was enamored with)
If the vette got cam in cam timing and DI, I think the pushrods could be made to last 10 years.
Your point of the same model year is noted, but from 1998 to 2006 Vette sales were always in the mid 30 thousand sales. In 2007 they nudged 40 thousand. But has been declining ever since to just 13000 cars in 2011. Besides the 1997 slump of only selling 9000 cars, sales have not been that dismal since 1961.
The vette is a great package, its numbers and LeMans victories prove it. But nevertheless, its desirability is waning.