With CS6 Adobe discontinues boxed versions of it’s creative software. In the future they will only be available throgh the Creative Cloud subscription service. Of corse the previously owned boxed versions will continue to operate, but you cannot buy them and the company releases no more updates to them to increase their compatibility or stability.
In the Christmas preparation preriod Adobe made his best offer ever to connvince photographers to choose their cloud base subscriptions. They offered an unbeatable price for the most popular photography software package.