We've had to fork xhyve very heavily for Docker to embed it, and are making many changes in a very rapid loop as we improve d4mac. We're still debating whether

We've had to fork xhyve very heavily for Docker to embed it, and are making many changes in a very rapid loop as we improve d4mac. We're still debating whether to contribute back into xhyve or just make it a separate open-source project with its own pace and design tradeoffs. Either way we are impatient to open-source it.