First, your RIs can automatically apply to your instances even when they are running in different AZs in a region. Until today, RIs have provided customers both a capacity reservation and significant discount. Many customers have told us is that they primarily care about the discount, and would waive the capacity reservation for more discount flexibility. Now, RI customers can choose to waive the capacity reservation, run their instance in any AZ in the Region, and have their RI discount automatically applied. This means that customers no longer have to worry about launching their instances in the right AZ to match their RIs, but can focus more on the needs of their application. The regional benefit is available for all RIs and is offered at no additional cost.