All I needed to restore my system init behaviour to something useful on 16.04 was:
apt-get install upstart-sysv
I'll consider revisiting systemd at some point in the future if Ubuntu is willing to migrate my init configurations properly, and I'm assuming that this approach will become untenable as systemd's tendrils creep deeper into the system, but for now it gets me back to a seemingly functional system.
The significance of this is Elon Musk, who is the self-driving Uber of dot.com billionaires and is the hero of our times.
Well, I knew Steve Jobs well enough, and have met a few civilian astronauts and a bunch of other rich people. None of the others seem to have done so much for the long-term future of the human race as Musk has in leading the path to more affordable spaceflight.
They want to preserve that plausible deniability and ensure some former employee didn't say something in a company email you weren't aware of that winds up costing you $'s in a lawsuit.
I think that in many cases, it's just as much about saving money in lawsuits by not having to pay lawyers to plow through years and years of "hey, lunch at Vinnie's, you in?" e-mails.
Well, it beats making them into the world's most complicated airplanes as with the space shuttle. SpaceX has proven that they can do vertical landings of the first stage intact onto both land and a seagoing barge; after a trip out of the atmosphere and to about 1/5 of orbital velocity but not into orbit. They plan to do a parachute-less vertical landing of the Dragon capsule after a heat-shield re-entry. That turns out to be far less expensive and complicated than a space plane. It does turn out we need a lifting body for much larger vehicles. It still doesn't have to be a plane, though.
We don't need wings.
"Spock, did you see the looks on their faces?" "Yes, Captain, a sort of vacant contentment."