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  1. alterConfigs has been deprecated and will be removed in a future release;
  2. we are using incrementalAlterConfigs to change user/topic/client-metrics configs, it would be benefit to unify broker configs.;
  3. incrementalAlterConfigs is more convenient especially for updating configs of list data type, such as "leader.replication.throttled.replicas" 

  4. We are forced to pass all sensitive configs to update broker configs when using alterConfigs  with the current cli tool because sensitive config values are never returned to the client.

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  1. We fallback to using alterConfigs automatically if incrementalAlterConfigs is not supported, we need to unify the semantics if we want to do this heuristically, so we choose to give this privilege to users by add adding --disable-incremental.