I don't think it even made it far enough to be "obsolete". After 20 years development, on the worthless flying Turkey earlier this year: :
"....Program officials continue to struggle against a tide of F-35 design flaws. Nearly every time the engineers solve one problem, a new one is discovered. The F-35 still has 871 unresolved deficiencies, only two fewer than last year. Ten of these are the more serious Category I deficiencies that “may cause death, severe injury, or severe occupational illness; may cause loss or major damage to a weapon system; critically restricts the combat readiness capabilities of the using organization.” "
-$100 million a pop too...but never mind. the stupid Brits will buy them as disguised tribute money to their US military industrial complex masters and of course that will give them something to play with on their own new and entirely worthless aircraft carriers.