This is discussion archived from a time before the current discussion method was installed.
Working Title: Comuting On A Bus: From YKTTW
Random Troper: What's the Subtle Trope Distinction between this and Isnt It Sad?
Duckay: I'm fairly sure that Isnt It Sad refers to when a character is dropped from minor character to extra in an adaptation, whereas this is as time passes in a work (eg, a TV show) a main character becomes a secondary character/recurring guest instead of a main star.
Micah: Also this is a bus trope, which implies that there's an actual narrative reason why the character starts appearing less often—they're not just Out of Focus, they're actively not around most of the time.