Long time ago when you pulled into your local gas station a guy came out, pumped your gas, cleaned your windshield and checked your oil. Might even check tire pressures. A good number of them had 'jalopy's' belonging to the owner/mechanic/friend parked outside that drew kids like moths to a flame. You might even get a chance to sit behind the wheel for a moment too. And you were hooked.
All that is gone today. You can't go to a junk yard, bust out the glass and go racing. Fuel, cell, seat. belts, racing wheels etc all add up. Few years ago I scratched out the cost to go racing in a hobby stock type class for my son and his buddy. When I hit 10k they decided maybe not.
So the numbers of those with the desire, and the needed funds, has diminished greatly. Local short tracks fight off attacks every year, noise, pollution and traffic. Developers put pressure on the track owners to sell and offer the city/town riches in the form of taxes from their proposed new housing development..
Sad to say it's only a matter of time before tracks slowly disappear.