And regarding the stealth and other tech stuff, well, I'm not sure about that. During the last ILA the F-35 didn't fly because some company, Hensold if I remember well, had some fancy new radar tech on-site. They only flew when the radar was removed from the premises, even then rumor at the time was Hensold could pinpoint the F-35 reasonably well.
If you ask me, the F-35 was a shot at a NATO monopoly on combat aircraft including a decade long support market and de-facto last word on operations regardless of operator. Seems it didn't work out as planned so far with Germany and France as well as the UK looking at home-grown Gen5+ fighters.