A person labeled only as ‘wicked’ sent me a link to this conversation about BSD unification. I’ve seen the topic brought up before, and I’d argue that it’s already happening, slowly. DragonFly has code brought in from FreeBSD, pkgsrc from NetBSD, pf and dhclient from OpenBSD, etc. ’bmake’ is used in NetBSD, FreeBSD, and DragonFly now. Clang works across the board, I think (dunno the status on OpenBSD). There’s more of that cross-pollination going on if you think about it.