Inspired by requests such as this one.
I've been wondering how much work it takes the mods to perform a retag. Not that I want to ask for one, but simply because I'm curious ...
Also, as a side question which might be more interesting: Would there be some value to a system which automatically retagged certain popular retag requests behind the scenes? In other words, if a user asked a question and tagged it with "winforms," the StackExchange engine might automatically retag it "windows-forms?" (The only way I can see this working is if all retags performed by mods were tracked, and then as a retag was performed, StackExchange would learn that in the future no new questions should be allowed to use the replaced tag. Don't know what that would do to performance.)