User blog comment:Zack Tan/Volume 7 Intermission/@comment-71.42.250.82-20150922154816

If all the characters who currently reside in this new world are familiar with Yg... then they are familiar with it from an older version. Remember that Ainz and his group maxed everything out and stayed until the very end, meaning they have the most information from any groups. Many of the NPCs never even had to go into combat because people never made it to the higher levels.