Still dont get how HC is tied to weekly maintenance

[kinect-3280561 (kinect)]

Its explained here in this bluepost. Basically database migrations to summarize it short.

Burning Crusade Anniversary Pre-Patch Downtime

Hey folks, I wanted to stop by and share with you a little of the “why” involved in the upcoming 24hr maintenance window for Burning Crusade Anniversary, as it is, quite rare for us to have a downtime this long. WARNING! This post contains no useful information at all! I mean it! This is just potentially interesting insight being shared for anyone who enjoys this sort of thing. When Classic approached the Server & Live Ops teams about launching this new thing called Anniversary, there was a r…