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* api-change:``ec2``: [``botocore``] X2ezn instances are powered by Intel Cascade Lake CPUs that deliver turbo all core frequency of up to 4.5 GHz and up to 100 Gbps of networking bandwidth
* api-change:``kafka``: [``botocore``] Amazon MSK has updated the CreateCluster and UpdateBrokerStorage API that allows you to specify volume throughput during cluster creation and broker volume updates.
* api-change:``connect``: [``botocore``] This release adds support for configuring a custom chat duration when starting a new chat session via the StartChatContact API. The default value for chat duration is 25 hours, minimum configurable value is 1 hour (60 minutes) and maximum configurable value is 7 days (10,080 minutes).
* api-change:``amplify``: [``botocore``] Doc only update to the description of basicauthcredentials to describe the required encoding and format.
* api-change:``opensearch``: [``botocore``] Allows customers to get progress updates for blue/green deployments