2010 Hyundai Elantra Tire spots

I have been told all different things about tire spots. I have let my Hyundai sit for 3 months. I am worried about tired spots. Some people insist they are a thing of the past and some say they still happen. The car has been in a dry garage with mostly warm temperatures (in Southern Florida) The tires only had about 8000 miles of wear on them. So is there anything to worry about? They are factory tires.