Pat: I totally agree with your train of thought. In the small Friday breakfast group you are familiar with, we talk about the exact same thing.
Values of classic vehicles depend a lot on the existing "fan" group for that vehicle. The size of that group is largely age dependent.
It has to do with what you grew up with, what you liked and dreamed of when you were a kid or what time you were getting into vehicles.
Myself, personally, I can NOT get excited about cars made before 1950 and motorcycles made before 1969.
A 1932 Ford Roadster, no matter how nice it is being done and whether it has an original steel body or not will not get me to drool over it.
The interest in older vehicles will die off with the guys who are into them and the younger generations are looking at different vehicles.