Also, Node v7 will likely get a semver-minor update with V8 55. So, simply waiting for v7.3 or v7.4 should be sufficient and it will be enabled by default.
https://github.com/nodejs/node/pull/9618#issuecomment-264641...
Those who are sticking with the LTS release for production will need to wait until April/May 2017. March is overly optimistic by the OP as the currently scheduled date is 2017-04-30.