I cannot imagine how expensive it would be to laminate even one magazine, let alone dozens or hundreds of them. Even in less than ideal conditions, paper can survive a long time. Look at the Dead Sea Scrolls, or any of the books from hundreds of years ago. They aren't as pristine as they once were, but they are still in tact.
However, I am sure the paper they used back then was a lot better quality than what we get now. Plus the vegetable-based printing ink they use now can't withstand a thumb on it for a short length of time, so magazines from today probably won't last nearly as long as the stuff that came before it. Even 90s magazines withstood reading better than what we get today.