Not everybody uses or needs autoscaling. In fact I would venture that the vast majority of companies doing business on the internet, even those that have sunk their money into the cloud computing gold rush, do not need autoscaling.
I would argue that everyone needs auto scaling, even if it's only to use it to scale manually, or change/upgrade instances easily. Being able to just tell your auto scaling group to do +3 then -3 to replace your 3 instances without downtime is quite nice.
