Radars are basically worthless, it’s all about passive detection perversion. The lower RCS foe will have hardly advantage whatsoever when he uses his radar, as it will alert the enemy’s RWR, especially if the foe has jamming and a good radar/EOS system in return.
I thik to say radars are worthless is to not understand how they are used, i have certainly never ever read of a fighter pilot or anyone else invloved with fighter aircraft saying radars are out of date.