It's been a while since SharePoint Overflow became SharePoint.SE, but this Google query shows that there are still questions, answers and comments that refer the old site and all these links are dead - no redirect, no 404, no static page telling to go to SharePoint.SE, nothing.
I can edit the questions and the answers, I can flag the comments (though I'm not sure if I should), but wouldn't it be easier to automatically replace all the occurrences of
sharepoint.stackexchange.com in the database?
Let me know how this problem will be handled - will it be the regular flag&edit way or a few UPDATEs on the appropriate tables?
I wouldn't like to spend a few days correcting it manually just to learn that the remaining issues will be fixed automatically.