| Clue | Source | Date |
|---|---|---|
| "So much for that, then" | The Telegraph Cross Atlantic | 19 Oct 2024 |
| "So much for that idea" | ||
| '. . . never mind, then' | USA Today | 30 Jan 2022 |
| 'So much for that' | New York Times | 23 Aug 2020 |
| 'So much for my theory' | New York Times | 17 Aug 2018 |
| "So much for my theory" | ||
| Tentative negative |