How about making airports like planes- depending on demand they will open, close and grow?
In Montreal they went back to a smaller airport after they had a bigger one, because all the flights diverted to Toronto.
Can it be done in AWS?
It doesn't matter what the final judgement is of what to do- (I mean: There are multiple possible solutions for a situation)
the key thing is that the options regard the current situation.
e.g. If Montreal will be booming with flights they would leave the old airport.
If it would be a ghost town then they might keep it, or might tear it down- randomly.