That sounds interesting, I generally deploy to vagrant via ansible using the same config as production (just a different file with configuration variables) since that allows as close as possible replication of the deploy environment (particularly for older projects on 14.04 when I'm running 16.04 on the dev machine), lxc would be useful for those "I need to simulate lots of machines" configurations though.

I wasn't aware that it had gotten as good as those links look so thanks! :).