@lasercats Probably because they are a brand new group, so they're taking their time to do bit by bit to learn the best way of doing things, rather than release whole chapters that may be sub-quality.
Probably also so that they can release regularly even though they might be working slowly atm...
Here's 4999's newer classing for those confused by the Keter classification.
If anyone is interested in the newer system they're rolling out to help clear up confusion about SCP Classes, here's the wiki's guide on the categories and symbols for it...
@levyoasu Page 28 says that the dragons (minus Mear) return to the mountain, so they aren't following him. Unless you mean for the arc that just ended.