OMG not maintenance.......!?! :P

10hrs is kind of short really considering the other major updates they have done.

The data centers and stuff are all over the world... I'd be surprised if all this stuff didn't have to be synchronized in some way. Ten hours covers having a human being being awake in every time zone during normal hours pretty much all over the world at some point during that time. It's a nice thing to have human beings being conscious at the controls when stuff could break. I'm sure they could do it faster but like, I'd rather it be a sure thing that it gets done right.