I mean... it went quite well all considering? There was some site instability for a brief period of time and now it's back to working normally. The initial hypothesis was that the data center was vital and so couldn't be shut down quickly. Turns out the hypothesis was incorrect. So I'm not quire sure that makes the point you're trying to make.

Of course Twitter is definitely not all use cases, so trying to generalize from one data point isn't a great idea in general.