How should my duster handle
I think it all comes down to what someone wants out of their car. For some it might be the feeling from back in the day, for others it might be a desire for a sweet driving car, or maybe they want the baddest car on the block regardless of how it drives.
For the guy that likes to go back in time, a modern suspension and steering would ruin that because it doesn't feel like it did "back then". For the guy that likes to drive, he probably doesn't care how it drove when stock, he wants it to do what he want when he wants which means a modern suspension and steering. The guy with the motor sticking out of the hood and big and littles doesn't care how it drives now (or even back then) as long as it scares people to ride with him. To each their own.
Add that people's definition of "drive their car" could be different depending on geography and intent. And that definition doesn't come through, sometime even when they try and explain it. 11 miles of city/urban driving is different than the Tail of the Dragon but both guys could say they drive their cars.
The trick is to not get too wrapped up in "how I would do it" and let people build and use their cars the way they want. I might not agree with the restoration crowd, but I am glad restored cars are out there and can still enjoy the fruits of their labors. Just don't look down on me or tell me what I am doing wrong because of a "stock is best" attitude.