Unfortunately there are very few west coast independent teams in TF. Fortunately there are quite a few independent west coast funny car teams. On the east side of the country it’s almost the exact opposite.
Unfortunately your statement is more than likely true. In a lot of cases, the event tickets being used in 2021 were purchased in 2020. I don’t know the percentage of renewals from track to track but I would guess it’s around 40% year to year.