@brudgers suggested to re-send this link as "Show HN" https://news.ycombinator.com/item?id=12834893 Sorry for a copy, unfortunately I'm unable to edit or delete an original submission.
Without the ability to drive over vm back ends its not much of a replacement IMO.
Virtual box is a pig on macOS. With Veertu now available for free I'm not sure why anyone would choose virtual box any more.