Recommended items need to be updated along with items
Title.
Champions who thrive on crit chance still had Youmoo's recommended even before the marksman update made it easier to buy crit chance.
Champions who may have needed Athene's before for the defense still have it recommended despite their complete lack of heals.
Champions who benefit more from Titanic Hydra still have Ravenous recommended.
Basically, if an item gains or loses something that changes the type of champion who should buy it, or new items are created, the recommended builds need to change accordingly.