Recently I've been thinking about how much the actually plot of a comedy actually matters, and I've been thinking more that it's not so important as long as it's funny.
Obviously you'd think there would have to be a running plot, but the Family Guy get away with constant, unrelated flashbacks and cut aways.
Even The Simpsons seem to take time away from the plot, having scenes that are slightly related, but don't seem to move the story on at all.
Probably the best, and my favourite, movie that does roughly the same thing is Airplane!, which a lot of people know is really a collection of scenes involving the passengers (guitar song, talking jive, Nuns World, black coffee), which doesn't really move the story.
To me, it seems that always keeping with the plot isn't entirely essential as long as the other scenes are slightly related and of course, funny, such as The Simpsons and Airplane!.
Any other opinions?