If someone expects me to pay $2.5 million for a car, then yes I want it date coded correct. But also note that the date coded cars are more often than not 2 ton paperweights that guys oowww and aawwww over and do nothing but occupy time and space. These are automotive art. Same as a painting on a wall. I cannot condemn anyone for appreciating the time and effort to turn back the clock on these cars, and I honestly am astounded at the time, effort, and coin it takes to make one of these.
That said, I'd sooner hit third gear on the blacktop in a 3.91 equipped 1968 rusty road runner with ripped seats and piston rings that are but a fond memory.
But the museum pieces are a nice preservation of history.