User blog comment:Kirkburn/Technical Update: May 27, 2015/@comment-1430834-20150528143010

Speaking of Achievements, is it intended for Achievements to only rely on data that has been added after the feature has been turned on for a particular wiki? For instance, I have more than 2000 edits in w:c:toarumajutsunoindex but didn't have Achievements activated until several years later, where my current edit count is at 500 or so.