I think Jim was simply saying that it is possible for LED bulbs to fail...not that all of them will fade or fail.
I assure you...if it runs on electricity, it CAN fail.
'04 GMC Sierra 2500HD, CCSB, D/A, MaxBrake, B&W Companion, Retrax Pro, AR Power Steps
2013 Rockwood 8289WS w/Diamond pkg
1969 Camaro RS/SS Convertible
Dad's old 1968 Empi Imp (recently recovered from under 21 years worth of boxes/dust)