I've not even had it 2 years but from looking underneath it looks to have been rustproof many times, I'm pretty sure the PO told me that before his family had it, it was done every year. And this isn't the oil spray stuff, it's thick rubbery stuff. I am going to have it krowned this year, after I clean out the frame (again) and spray ATF in there, also spraying it in the body panels through the little ports that were made from the undercoating place.
We all don't live in a place where the roads are perfect, and nothing rusts or wears out....My year old shocks are already toast. And the explorer suspension is mushy, my dad test drove one before he bought the pathfinder and he said it just didn't feel right.
Also how would you know what it drove like when new? And I think they're talking about the firestone incident (I remember seeing one rolled over with a blown tire.) when they say dangerous.