The main risk is a higher Chance for a collision, if the Body is prepared properly and taken care of. I drive a 78 model for 25 years after doing thorough bodywork with a Budget partial paintjob and the spots I welded are still intact, two more came up over the years and the Frame rail that started already to rust 25 years ago will Need Attention the next two years maybe. I know a one car owner who never had a Garage that to this day keeps his car in unbelievable shape still with the first metallic paintjob.
I'll admit though I have no Problem making a fool out of myself, flushing my wheel houses and chrome parts in the rare weeks with severe salting in my neck of the Woods every evening turning my driveway into an iceroad before putting the car back into the garage.