I understand that people who "gotta catch 'em all" (i.e. completion-ists) might want this, but I don't think my wife or I would ever use it, and I'm not sure what percentage of crafters would.

So because SE cannot do everything anyone might like, there might be more popular features that SE could implement for crafters instead of this. Like some of the functionality I currently rely on Garland Tools for (e.g. building "shopping lists," finding similar-looking gear, etc) ...