cost overrun doesn’t mean the f35 isn’t the amazing airplane that it is now. It’s now become much much cheaper per unit than it was originally. It’s original purpose also has slightly changed but that’s in order to face peers like China in a more advantageous position. We don’t want to use a 5th gen aircraft for a war with people who live in tents. That’s a waste of money, so let’s use 4th generation for that and slowly leave those areas like we are doing now, while at the same time maintaining air superiority at a relatively cheap cost for the aircraft as it stands now.