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This KIP will benefit CEP-44: Kafka integration for Cassandra CDC using Sidecar 

Public Interfaces

1. New Producer/Consumer configs to support Composable Serializer/Deserializer

In some use-cases we might need a way to be able to chain of Kafka serializer/deserializer before applying large message serializer for example need to apply schema or special format like avro or protobuf. We could just create a single org.apache.kafka.common.serialization.largemessage.Serializer that implemented the Kafka Serializer interface, but we would need to create the different versions (AvroSerializer, ProtobufSerializer) with their support for the schema.
Instead the KIP proposing a composable serializer that allows concatenating several serializers to perform what we are looking for here. 

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