Yes, and no issues at all. We run superclusters with a bunch of nodes, and the Raft-based leader election system has worked flawlessly so far (knock on wood!).

Yes, and no issues at all. We run superclusters with a bunch of nodes, and the Raft-based leader election system has worked flawlessly so far (knock on wood!). Keep in mind that NATS does not yet support value operations other than setting the whole value. Optimistic locking is supported, but NATS does not have inc/decrement, append, set members, etc. I believe such support is on the horizon, however.