Neither is turning performance...the F35 offers a very fine package that beats most everything out there
Does it? Pretty sure it's just proven that without its cloak of stealth, it does very badly in a WVR environment...get back to me when it's joining the fight higher and faster than some of its 'inferior' 4+ gen rate fighter contemporaries.
Guaranteed? Tell that to the nations buying the F35 and to Russia and China
The UK had its heart set on binning it back in the last defence review, but politics prevailed. Just a quick, cursory glance at China and Russia's stealth aircraft make a mockery of actually calling them true stealth fighters.
As long as it moves, produces heat, and reflects even the most minute radar signal, it's still going going to be detectable, and the exponential expansion of processing power in computers combined with Russia's arch Nemesis relying entirely on stealth surely makes it an inevitability that detection and tracking will evolve very rapidly in the next decade.