How many summers? My late-model Dodge is already getting a tad of "frosting" on the black plastic trim pieces, and everyone's tires get nuked over the summer months.
2005 Exploder is my daily driver. I really have neglected it more than any vehicle I have owned as far as wax, amorall. and just overall detailing. It has held up amazingly well. Tinted windows help with UV light breaking down plastic on the top of the door panels, etc.
I don't think most people will leave their gun sitting on the dash or somewhere in direct sunlight.