I tried to give it a shot as a spectator. It opened at 10:00 & I got there a little after 11:00. The line to park was incredibly slow. I waited for half an hour & moved so little that I figured it would be at least another hour from there. Probably more. I bailed.
I'm not sure if they were expecting a low turn out & didn't hire enough staff, or if no one came back to work after covid, or if the place was already full & they were only letting in cars as others pulled out. I never got close enough to see. I've been to other events there & never have seen the lot filled, so I'm guessing it was short staffed. Typically there's a line at Irwindale, but it moves right along.