After posting a question that had gone through sandbox, people typically remove the body of their sandbox submission and replace it with a link to the final challenge. This makes sense to help reduce scrolling in the sandbox.
I was wondering, however, if it would actually be a better idea to delete the sandbox post in addition to removing the body. Even though removing the body of the post helps to reduce scrolling, the answer still occupies a position in the sandbox and bumps other answers onto the second/third pages.
In the current sandbox, several of the most upvoted answers have been posted. On the first page, there are 30 answers, 16 of which have been posted. I think that deleting the answers will increase the visibility of the posts which were on the second page.
(I realize that this is only a problem for those who sort by votes, but I think most users sort by votes.)