Bill Clinton and GHW Bush attended the Indy 500 together here back in 03 (both were obviously former POTUS with some level of security detail).
But Indy is so big that it wasn’t a noticeable change.
I’ve been to the Indy a few times, As a yout, I sat in the infield and drank and hoped the Hell’s Angels didn’t decide to camp near us. As an adult, I sat in the stands and watched safely from my seat as the infield fans demanded young ladies remove their tops. My most memorable 500 was when they honored Mr. Haney- Pat Buttram.