content: The biggest problem with the F-35 is the entire concept of the JSF. You have one aircraft trying to fill too many roles engineering compromises have to be made to meet all those mission requirements and at best it ends up a jack of all trade and a master of none. This has happened before in the past with the F-4 Phantom II and the Tornado. Like these two aircraft they will find a mission F-35 will do well at maybe even excel at but it will have cost more then a specialized aircraft and there will be the added cost of building still other aircraft fill the roles it didn't perform acceptably at. I expect maybe the F-15SE to enter production or maybe more F-22s built to fill those roles as well as life extensions for aircraft the JSF was supposed to replace.