...
- Prefixed wildcard ACLs (KIP-290), Fine grained ACLs for CreateTopics (KIP-277)
- SASL/OAUTHBEARER implementation (KIP-255)
- Improved quota communication and customization of quotas (KIP-219, KIP-257)
- Efficient memory usage for down conversion (KIP-283)
- Fix log divergence between leader and follower during fast leader failover (KIP-279)
- Drop support for Java 7 and remove deprecated code (e.g old scala clients)
- Connect REST extension plugin, support for externalizing secrets and improved error handling (KIP-285, KIP-297, KIP-298 etc.)
- Scala API for Kafka Streams and other Streams API improvements (KIP-270, KIP-150, KIP-245, KIP-251 etc.)
...