There is no use of having a classic, or any car for that matter, and not driving it. Like you said, they were designed to be driven. Even if you have a very rare and expensive vehicle, it needs to be driven sometimes. I can't say how much I drive my classic because it is being restored right now, and also, it will only be driven in the summer. But I voted weekly because hopefully that is how much I will be driving it when the restoration is completed.