There are cars that are driven by their owners and there are drivers.
I'll guarantee most of those cars don't see much time on the road. Mine is my daily driver on the weekends and weekdays after work. I come home and go to dinner, need to go to the store, need to go anywhere, it's in the Bird. And I do all this driving in Florida.
I kept the steel radiator that came from the doner car I pulled the engine from because I had never used a new aluminum unit, and I recently gave that steel one away as I'm confident I won't be needing it. That radiator with a shroud and a flex fan keep the 440 at the right temperature even when sitting in traffic in 98-degree heat day after day.
To me it makes no sense to pay $300-$500 for an OEM unit, then more money to have it cleaned or re-cored, when you can buy a new Champion for a fraction of the cost and you know it'll do what you need done right out of the box. So unless you're doing a resto, you should go with a Champion.