Back in the day they weren't 52 years old, lol. There are just so many pieces of mechanical parts to a car that could fail, considering their age. Bearings, wiring, cooling system, motor, trans, rear end...unless you have replaced all parts, something could fail on a trip. And then there you are, waiting for AAA to tow you to a near by hotel, and now your wondering how you get yourself and the car back home. Thankfully I make a good amount of money so it wouldn't be an issue, but not everyone is in the same boat.
So yea, that's why I can see why taking my new truck on a long journey and not even think about it, versus a long trip in an old car.
Don't get me wrong, I'm definitely taking trips in my 67 cuda this year but I do realize it can break down.
And that's why Alan's trip is awesome, and inspiring.