Arguably there are benefits to developing in-house expertise, and no better way to develop expertise than to architect and build a solution end-to-end. Twitter now has several domain experts on staff who can continue maintaining DistributedLog and&#x2F;or weigh its benefits against Kafka&#x27;s and make more informed decisions going forward.<p>Not saying that they couldn&#x27;t have worked more closely with Kafka&#x27;s team in the first place, but, hey, now we have two Kafkaesque log services instead of just one. Seems like a win to me.