Creator of Raft is speaking at our meetup. What questions do you want answered?

I'd ask:

It seems there are a lot of implementations of Raft, few of which are entirely complete (CoreOS's etcd seems to be the best). Perhaps this is the downside of the emphasis on ease of implementation, vs creating 'golden libraries'. Which implementations does he think are the best in each language?

PS What is the meetup?

For context, Raft is the consensus algorithm that powers awesome distributed systems like Docker, CoreOS, Kubernetes, Consul, and more!