I think all of the stated reasons/causes of the aged fan base are accurate. I am 51 and now have the time and disposable income to attend as many races as I want to (20+ this year) and all types sprints, midgets, mods, late models even silver crown. I was an avid nascar fan for many years, now I gave no interest there. I do attend the truck racecst Eldora though. My son (26) would love to attend as many races as I do but 50-60 hour work weeks routinely get in his way. I tell him I'll have to keep his seat warm until he can get there.