Neighborhood grandma: In order to minimize children's sorrow at having you leave them after Saturday afternoon playtime, it's often best to just briefly say, "Bye, kids!" and then quickly shut the door without further adieu
Marriage counsellor: I always advise my "starry-eyed lovebirds" clients to "look at the whole picture" --- i.e., consider the entire scope and details of marriage --- before deciding whether they would truly be a good match for each other... I'd sure hate to see their fairly-tale romance merely proceed from "I do" to "Adieu" like so many of marriages do these days.
Where you make a big deal about saying goodbye when those around you reallydon't care much if you stay or go.
That clumsy gluttonous party-crasher wasn't invited to our backyard barbecue in the first place, and so his "long tearful goodbye" hijinks were really just "much adieu about nothing".