The board in that pony Car was a classic hullish pintail from the early 70s when every blank was using a resin glue up for a stringer. That, as we now know, is really not a very good idea for either strenght or flexibility
What was unusual was that the blank was a triple resin glue up. So obviously someone came up with a way to divide by zero
You'd have to ask the question..
All those old 50's & 60's "everyday" surf wagons/cars that have been shown have such old school class.
So will any of todays cars be held in the same esteem in 2050