Well, the paint does anyway. Sun kills the synthetic urethane clear coat over time.I do think cars tend to last longer if they can spend their nights indoors
I just hauled two large pickup truck loads of junk out of my garage and down to the dump. It's nice to actually have space to walk around in there, and to actually be able to put the lawn tractor away!
Congratulations on being able to actually throw stuff out! I'm postponing that phase. I'm still donating, or recycling, or selling, or boxing it up and storing it out of the way, in my ongoing decluttering. Very little gets thrown out.