There was one section where there was a land slip, resulting in some armco fencing and support posts dangling in the air, which would require money to fix up.
I've been told there are groups who don't want motor sport (or even motoring) activities at the track, and for that matter, don't even want a McDonalds in the Blue Mountains (can't blame them on that), so it will slowly fade away into the scenery.
They do allow walking the dog activities on the old track however.