That price has more than doubled in just the last few years, and there
appears to be no end in sight. So the question is: How much higher must gas
go up before *you* hang up your headphones for the last time?

For me, the limit would be $10/gallon before I will stop long distance
flying, such as flying between Seattle to California. To stop local
fun flights - maybe $15-$20/gallon. And I use autofuel.

The worry though is when the price approaches $7-$8/gallon, so many
people would give up flying all together and we'll end up losing many
of our airports due to lack of use, and the remaining ones might not
have gasoline for sale due to low sales volume (JetA will likely still
be available in those places). That'll make long distance flying trip
less and less viable.

The problem is magnified by the fact that 100LL price will go
exponentially more expense as consumption continues to dwindle, due to
the need of a dedicated distribution infrastructure.