What are the three biggest impediments, or roadblocks, to fast product cycles, especially in the cloud?
Incomplete Testing. If you are not 100% confident that your testing covers every known use case, you will be fearful of releasing. Actually, fear of the risk of deployment often is the "canary in the coal mine" sign that your testing is incomplete. The other sign is infrequent releases, defined in the Internet era as less frequently than every few days.