So much for my theory then.
I know the cross bronx well. It and the bruckner are really the gold standard is awful roads.
I wish I were in your seat then. The doors in particular seem to be the 'most' rattles for my part. I think it's just a case of stuff felt in there once everything has...
I think the rattle issue is more to do with where people live than the build quality of their cars. For example, I drove down to North Carolina and then Florida earlier in the year and the roads were glass smooth. One wouldn't have heard a rattle in an Oldsmobile Omega from the 70s.
However...