Keep an eye out for Northguard. It's the name of LinkedIn's rewrite of Kafka that was announced at a stream processing meetup about a week ago.
As such, you can no longer use existing software that is built on Kafka as-is. It may not be a grave concern for LinkedIn, but it could be for others that currently benefit from using the existing Kafka ecosystem.
As such, even with Xinfra deployed, you have to rewrite all the software that connects to Kafka, regardless of programming language.