When is everyone going to understand that by the time the F-35 comes into service, its stealth technology will be irrelevant? Advancing technologies in passive radar will make the current coatings pointless. If the B-2 and F-117 could really be picked up by disturbances in the signals from mobile phone masts ten years ago, it fair to assume that by the time the F-35 starts to become available in numbers in ten years time, then 20 years of development of passive techniques will have rendered todays stealth technology obsolete. Some of yo are talking of these aircraft flying for another 40 years - by which time the "stealth" will be 50 years old.
Its not as if thee aircraft will be capable of re-engineering as new technologies arrive: new techniques such as the visible and radar metamaterials now been worked on need to be incorporated at the design stage. not bolted on later.
These aircraft will only have a short windows of time in which they will be useful - and at present speeds they are going to be 7-10 years too late