This is discussion archived from a time before the current discussion method was installed.
Susan Davis: Racial and ethnic caricatures went away due to changes in society, rather than through overuse in TV and films. Likewise, so did ubiquitous on-screen tobacco use, submissive housewives, the Red Scare, and everything covered by The Great Politics Mess-Up. Is this a separate (meta-)trope?
Wiki: Well some soaps still milk it. Hence why no one take soaps seriously.
Ununnilium: Actually, I'm taking this out:
- Luke, I Am Your Father, though too many writers won't accept this.
...because it's any Reveal of a previously-unknown familial relationship between two characters. There's still plenty of room in there for fresh examples, above and beyond the melodramatic "For you see... I am your long-lost father!"