Not sure if that would work since most "duplicate" questions are similar but not identical. Therefore an answer responding to the duplicates' specific use-case

Not sure if that would work since most "duplicate" questions are similar but not identical. Therefore an answer responding to the duplicates' specific use-case would be confusing in the context of the original question. Perhaps include the duplicate question in the answer when it's merged. Hidden behind a link e.g "This answer was posted in response to a duplicate question" and a link to view the content of the duplicate question.