100 million users? Does anyone need to have that capability?
I think the point is handling peak loads and knowing you can get all your users (whatever that number might be) back online quickly. To quote the article "what happens if Call of Duty goes offline for maintenance and then six million users try to log back in at the same time"?
Good point. Skimmed that. But how often does that really happen? Don't sites and apps just handle that? Isn't that an IT job?