I think very few Americans would want to stay. I would have to wonder who they are or why they would want to stay unless they are somehow connected to the taliban man?
Biden will try to pay the taliban man to get them out.
Whatever happens the war will not be started over.
If the ISIS and taliban man start beheading Americans we may take some punitive actions: bomb them or attack them with drones and missles but the war will not be reset.
If such atrocities occur the taliban man will probably blame ISIS or rogue elements.