We went through this in the mid-70's and there were a lot of changes, brackets took over and class racing was only held at the points meets. Tracks had 2 or 3 brackets and then got up to 4 by the end of the decade. Many tracks are back to 3 or even 2 money brackets any more. There are still a lot of cars in garages on Sunday, it might be a few years before they come back out. When things get better, there will be major change again, I'm thinking IHRA will be gone and NHRA will have a lot fewer races. Probably 30 to 50% of the local tracks will close up.