Let's review the recent dead-body count...Atlanta, Houston, Memphis, West Palm Beach, Denver, Englishtown, ATCO, Phoenix-Speedworld, Fontana
...and the ones I can think of with known uncertain future or already hanging on by a thread on life support: Phoenix-Wild Horse, Chicago, Seattle, Topeka, Sonoma (?), Bradenton, South Georgia (?), Sacramento
Saved only by wealthy racer intervention: Maple Grove, Pomona
Seems very "healthy" to me