User blog comment:TimmyQuivy/Introducing the UserRenameTool/@comment-3218221-20180212002839

I'd be more excited had the username I've wanted to rename my account to ("Rev") not aready existed (though I guess the anti-spoof measure wouldn't have let me use it even if it didn't?). I know the current rules don't allow for it, but you'd think that, say, the usernames of users with no edits (and had not been logged on for xyz amount of time) would be...available. (Not that I know whether the existing 'Rev' has ever made any edits or not; I'm just saying).

Ah, well. I suppose I could choose a different rename, but "Rev" would have been the most beneficial for a myriad of reasons. The first being that it would still be recognizable as me, to an extent - as a sysop, I realize that sysop renames carry more weight (in that you want to be known/a presence that users can come to).

Edit: Also, the help page that the tool links to doesn't exist.